Röntgen, Wilhelm Konrad von

discoverer of the Röntgen rays, born at Lennep, in Rhenish Prussia; since 1885 has been professor of Physics at Würzburg; his discovery of the X-rays was made in 1898, and has won him a wide celebrity; b. 1845.

— The Nuttall Encyclopedia

X-ray absorbing glass

glass (having a high lead content) that resists the penetration of X-rays and gamma rays

— Wiktionary

radiable

Transparent to radiant energy, especially X-rays. Capable of being penetrated and examined by rays or waves.

— Wiktionary

Crookes tube

An early experimental electrical discharge tube by means of which cathode rays and X-rays were discovered.

— Wiktionary

Compton, Arthur Compton, Arthur Holly Compton

United States physicist noted for research on x-rays and gamma rays and nuclear energy; his observation that X-rays behave like miniature bowling balls in their interactions with electrons provided evidence for the quantal nature of light (1892-1962)

— Princeton's WordNet

Compton, Arthur Compton, Arthur Holly Compton

United States physicist noted for research on x-rays and gamma rays and nuclear energy; his observation that X-rays behave like miniature bowling balls in their interactions with electrons provided evidence for the quantal nature of light (1892-1962)

— Princeton's WordNet

Compton, Arthur Compton, Arthur Holly Compton

United States physicist noted for research on x-rays and gamma rays and nuclear energy; his observation that X-rays behave like miniature bowling balls in their interactions with electrons provided evidence for the quantal nature of light (1892-1962)

— Princeton's WordNet

rem

A dose of absorbed radiation equivalent to one roentgen of X-rays or gamma rays

— Wiktionary

retroreflection

reflection in which the reflected rays are parallel to the incident rays

— Wiktionary

radiosterilization

The sterilization (either of an organism, or a surgical implement) by ionizing radiation such as X-rays or gamma rays.

— Wiktionary

electromagnetic spectrum

The entire range of wavelengths of all known electromagnetic radiations extending from gamma rays through visible light, infrared, and radio waves, to X-rays.

— Wiktionary

radiogram, radiograph, shadowgraph, skiagraph, skiagram

a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

— Princeton's WordNet

radiogram, radiograph, shadowgraph, skiagraph, skiagram

a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

— Princeton's WordNet

radiogram, radiograph, shadowgraph, skiagraph, skiagram

a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

— Princeton's WordNet

radiogram, radiograph, shadowgraph, skiagraph, skiagram

a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

— Princeton's WordNet

radiogram, radiograph, shadowgraph, skiagraph, skiagram

a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

— Princeton's WordNet

radial

issuing in rays from a common center; relating to rays of light

— Princeton's WordNet

X-Rays

Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.

— U.S. National Library of Medicine

Philadelphia fleabane, Erigeron philadelphicus

especially pretty plant having a delicate fringe of threadlike rays around flower heads having very slender white or pink rays; United States and Canada

— Princeton's WordNet

Philadelphia fleabane, Erigeron philadelphicus

especially pretty plant having a delicate fringe of threadlike rays around flower heads having very slender white or pink rays; United States and Canada

— Princeton's WordNet

Compton scattering

The increase in the wavelength, and corresponding decrease in the energy, of photons (especially of X-rays and gamma rays) when scattered by interaction with matter

— Wiktionary

Compton effect

The increase in the wavelength, and corresponding decrease in the energy, of photons (especially of X-rays and gamma rays) when scattered by interaction with matter

— Wiktionary

Actinic rays

"non-luminous rays of higher frequency than the luminous rays."

— The Nuttall Encyclopedia

aberration

The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus.

— Wiktionary

X-ray radiation

electromagnetic radiation consisting of X-rays, radiation in the X-ray spectrum, of shorter wavelength and higher frequency than ultraviolet and longer wavelength and lower frequency than gamma rays

— Wiktionary

Spectrometry, X-Ray Emission

The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods.

— U.S. National Library of Medicine

Actinology

the science which treats of rays of light, especially of the actinic or chemical rays

— Webster Dictionary

Ultrared

situated beyond or below the red rays; as, the ultrated rays of the spectrum, which are less refrangible than the red

— Webster Dictionary

Radiograph

a picture produced by the Rontgen rays upon a sensitive surface, photographic or fluorescent, especially a picture of opaque objects traversed by the rays

— Webster Dictionary

radiation

rays of energy produced by heat, light, etc.

— Kernerman English Learner's Dictionary

light

brightness from the sun's rays or an electric light

— Kernerman English Learner's Dictionary

Radiant

especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun

— Webster Dictionary

sunburn

red, painful skin that has been damaged by the sun's rays

— Kernerman English Learner's Dictionary

Ultraviolet

lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum

— Webster Dictionary

Gamma Rays

Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is between 0.1 - 100 pm which overlaps the shorter, more energetic hard X-RAYS wavelengths. The distinction between gamma rays and X-rays is based on their radiation source.

— U.S. National Library of Medicine

X-Ray Diffraction

The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

— U.S. National Library of Medicine

Aberration

the convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called spherical aberration, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and chromatic aberration, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus

— Webster Dictionary

Starfish

any one of numerous species of echinoderms belonging to the class Asterioidea, in which the body is star-shaped and usually has five rays, though the number of rays varies from five to forty or more. The rays are often long, but are sometimes so short as to appear only as angles to the disklike body. Called also sea star, five-finger, and stellerid

— Webster Dictionary

irradiated

Having rays.

— Wiktionary

rayless

Lacking rays

— Wiktionary

radiolucent

transparent to X-rays

— Wiktionary

hexactine

Having six rays

— Wiktionary

biradiate

Having two rays

— Wiktionary

octoradiated

Having eight rays.

— Wiktionary

radiophobia

The fear of X-rays.

— Wiktionary

asteriated

Radiated, with diverging rays.

— Wiktionary

cosmogenic

produced by cosmic rays

— Wiktionary

Sunny

exposed to the rays of the sun; brightened or warmed by the direct rays of the sun; as, a sunny room; the sunny side of a hill

— Webster Dictionary

Radiography

Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film).

— U.S. National Library of Medicine

roentgenotherapy

the therapeutic use of X-rays

— Wiktionary

radiate

To emit rays or waves.

— Wiktionary

sunning

sun tanning; getting some rays;

— Wiktionary

X-ray

A radiograph: a photograph made with X-rays.

— Wiktionary

radiopaque

impenetrable to X-rays and other radiation

— Wiktionary

ray gun

A fictional weapon that emits harmful rays.

— Wiktionary

irradiated

Emitted outwards from a centre like rays.

— Wiktionary

gamma radiation

electromagnetic radiation consisting of gamma rays

— Wiktionary

superburst

A very large burst (of X-rays etc)

— Wiktionary

radiator

Anything which radiates or emits rays.

— Wiktionary

sunshine

A location on which the sun's rays fall.

— Wiktionary

supersoft

Describing astronomical X-rays of very low energy

— Wiktionary

radiopacity

the state of being opaque to X-rays

— Wiktionary

X-ray

Of or having to do with X-rays.

— Wiktionary

rayproof

Shielded to prevent the emission of X-rays.

— Wiktionary

radiodiagnostics

diagnostics by means of X-rays or radiochemical tracers

— Wiktionary

radiability

the state of being radiable; transparent to X-rays

— Wiktionary

thermodiffractogram

A diffractogram produced using thermal neutrons rather than X-rays

— Wiktionary

cineradiography

cinematography of working internal organs, normally using X-rays

— Wiktionary

radiodiagnosis

diagnosis by means of X-rays or radiochemical tracers

— Wiktionary

eradiate

To spread out light rays in all directions.

— Wiktionary

Ultraviolet Rays

That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.

— U.S. National Library of Medicine

skiagram

A picture or image created from shadows, especially with X-rays.

— Wiktionary

beamy

Showing or emitting rays of light; beaming; radiant; shining.

— Wiktionary

sunburst

A figure or shape showing rays radiating from a central point.

— Wiktionary

starburst

A symbol similar to an asterisk, but with additional rays: .

— Wiktionary

radiodensity

The relative transparency of a material to X-rays and other radiation

— Wiktionary

dedisperse

To bring together data, rays etc that have been dispersed

— Wiktionary

caustic

The envelope of reflected or refracted rays for a given curve.

— Wiktionary

focus

a point at which reflected or refracted rays of light converge.

— Wiktionary

stellate

Shaped like a star, having points, or rays radiating from a center.

— Wiktionary

sunstroke

Heatstroke caused by an excessive exposure to the sun's rays.

— Wiktionary

X-ray fluorescence

The emission of electrons from a material when exposed to X-rays.

— Wiktionary

X-ray telescope

An instrument that detects X-rays originating from outside the Earth's atmosphere.

— Wiktionary

penetrometer

A device that measures the penetrating power of electromagnetic radiation (especially X-rays).

— Wiktionary

photogoniometer

A goniometer, used in X-ray diffraction, that detects the X-rays using a photocell.

— Wiktionary

radial

arranged like rays that radiate from, or converge to a common centre

— Wiktionary

focal point

A focus; a point at which rays of light or other radiation converge

— Wiktionary

X-ray tube

A device that produces X-rays by directing energetic electrons into a metal target.

— Wiktionary

collimated

of light beams whose rays are parallel and thus has a plane wavefront

— Wiktionary

radiate

surrounded by rays, such as the head of a saint in a religious picture.

— Wiktionary

acanthopterygious

Having fins in which the rays are hard and spinelike; spiny-finned.

— Wiktionary

X-ray microscope

A device that uses soft X-rays to produce images of very small objects.

— Wiktionary

focus

a point of a conic at which rays reflected from a curve or surface converge.

— Wiktionary

radioactivity

The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

— Wiktionary

beamstop

Any of several devices used in X-ray crystallography to avoid damage by X-rays

— Wiktionary

Myopia

nearsightedness; shortsightedness; a condition of the eye in which the rays from distant object are brought to a focus before they reach the retina, and hence form an indistinct image; while the rays from very near objects are normally converged so as to produce a distinct image. It is corrected by the use of a concave lens

— Webster Dictionary

sunglass

A convex lens of glass for producing heat by converging the sun's rays into a focus.

— Wiktionary

Absorptiometry, Photon

A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION.

— U.S. National Library of Medicine

positron emission tomography

A medical imaging technique which detects the gamma rays produced by positrons emitted from injected radionuclides.

— Wiktionary

estoile

A six-pointed star whose rays are wavy, as opposed to the straight lines of a mullet.

— Wiktionary

gamma particle

A photon with a wavelength short enough to be considered gamma rays. Usually emitted as a consequence of radioactivity.

— Wiktionary

radioscopy

examination of objects by the use of X-rays; radiology

— Wiktionary

sunburnt

Having a sunburn; having been burned by the sun's rays

— Wiktionary

sunshine

The direct rays, light or warmth of the sun.

— Wiktionary

radiate

To come out or proceed in rays or waves.

— Wiktionary

X-ray therapy

The therapeutic use of controlled doses of X-rays

— Wiktionary

helioelectric

Describing electric power generated by the rays of the sun

— Wiktionary

focus

To cause (rays of light, etc) to converge at a single point.

— Wiktionary

vergence

A measure of convergence or divergence of rays

— Wiktionary

gamma-ray

pertaining to gamma rays or gamma radiation

— Wiktionary

Triradiated

having three rays

— Webster Dictionary

Multiradiate

having many rays

— Webster Dictionary

photoscanner

A device which photographically records the gamma rays passing through tissue that has been injected with a radioactive material.

— Wiktionary

diacaustic

The curve or surface formed by the intersection of refracted light rays.

— Wiktionary

caustic surface

A surface to which rays reflected or refracted by another surface are tangents.

— Wiktionary

moonburn

A burn on the skin caused by excess exposure to the moon's rays.

— Wiktionary

sunburn

A burn on the skin caused by excess exposure to the sun's rays.

— Wiktionary

Radiation

Emission or propagation of electromagnetic energy (waves/rays), or the waves/rays themselves; a stream of electromagnetic particles (electrons, neutrons, protons, alpha particles) or a mixture of these. The most common source is the sun.

— U.S. National Library of Medicine

orthographic

Of a projection used in maps, architecture etc., in which the rays are parallel.

— Wiktionary

historadiography

the radiography of soft tissue using long wavelength X-rays of low penetrating power

— Wiktionary

cosmic ray

Cosmic radiation: a stream of cosmic rays.

— Wiktionary

Refract

to break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium

— Webster Dictionary

ampulla of Lorenzini

An electroreceptor found mainly in cartilaginous fish such as sharks and rays, forming a network of jelly-filled canals.

— Wiktionary

spread

To extend (individual rays, limbs etc.); to stretch out in varying or opposing directions.

— Wiktionary

sunlight, sunshine, sun

the rays of the sun

— Princeton's WordNet

sunlight, sunshine, sun

the rays of the sun

— Princeton's WordNet

Gymnura, genus Gymnura

butterfly rays

— Princeton's WordNet

Myliobatidae, family Myliobatidae

eagle rays

— Princeton's WordNet

Torpedinidae, family Torpedinidae

electric rays

— Princeton's WordNet

Dasyatidae, family Dasyatidae

sting rays

— Princeton's WordNet

Torpedinidae, family Torpedinidae

electric rays

— Princeton's WordNet

Myliobatidae, family Myliobatidae

eagle rays

— Princeton's WordNet

ray

emit as rays

— Princeton's WordNet

sunlight, sunshine, sun

the rays of the sun

— Princeton's WordNet

Dasyatidae, family Dasyatidae

sting rays

— Princeton's WordNet

Gymnura, genus Gymnura

butterfly rays

— Princeton's WordNet

X-ray therapy

the therapeutic use of X rays

— Princeton's WordNet

radiosurgery

The use of a directed beam of X-rays or other ionizing radiation to destroy diseased tissue

— Wiktionary

Rubific

making red; as, rubific rays

— Webster Dictionary

Ray

to shine, as with rays

— Webster Dictionary

Radious

consisting of rays, as light

— Webster Dictionary

Phosphorogenic

generating phosphorescence; as, phosphorogenic rays

— Webster Dictionary

Adiactinic

not transmitting the actinic rays

— Webster Dictionary

Penciled

radiated; having pencils of rays

— Webster Dictionary

irradiate

cast rays of light upon

— Princeton's WordNet

x-ray

examine by taking x-rays

— Princeton's WordNet

solarization, solarisation

exposure to the rays of the sun

— Princeton's WordNet

radiate

send out rays or waves

— Princeton's WordNet

solarization, solarisation

exposure to the rays of the sun

— Princeton's WordNet

radiopacity, radio-opacity

opacity to X-rays or other radiation

— Princeton's WordNet

X-raying, X-radiation

obtaining images by the use of X rays

— Princeton's WordNet

radiate

cause to be seen by emitting light as if in rays

— Princeton's WordNet

radiopacity, radio-opacity

opacity to X-rays or other radiation

— Princeton's WordNet

x-ray

examine by taking x-rays

— Princeton's WordNet

X-raying, X-radiation

obtaining images by the use of X rays

— Princeton's WordNet

X-ray machine

an apparatus that provides a source of X rays

— Princeton's WordNet

irradiate

To emit rays; to shine.

— Wiktionary

Biradiated

having two rays; as, a biradiate fin

— Webster Dictionary

arthrogram

A series of images, often X-rays, of a joint after injection of a contrast medium.

— Wiktionary

Reverberation

the act of reverberating; especially, the act of reflecting light or heat, or reechoing sound; as, the reverberation of rays from a mirror; the reverberation of rays from a mirror; the reverberation of voices; the reverberation of heat or flame in a furnace

— Webster Dictionary

disperse

To separate rays of light etc. according to wavelength; to refract

— Wiktionary

Elasmobranchii, subclass Elasmobranchii, Selachii, subclass Selachii

sharks; rays; dogfishes; skates

— Princeton's WordNet

Elasmobranchii, subclass Elasmobranchii, Selachii, subclass Selachii

sharks; rays; dogfishes; skates

— Princeton's WordNet

reflection, reflexion, reflectivity

the ability to reflect beams or rays

— Princeton's WordNet

Elasmobranchii, subclass Elasmobranchii, Selachii, subclass Selachii

sharks; rays; dogfishes; skates

— Princeton's WordNet

focused, focussed

(of light rays) converging on a point

— Princeton's WordNet

roentgenography, X-ray photography

radiography that uses X-rays to produce a roentgenogram

— Princeton's WordNet

Torpediniformes, order Torpediniformes

rays with bodies shaped like torpedoes

— Princeton's WordNet

disperse

separate (light) into spectral rays

— Princeton's WordNet

Torpediniformes, order Torpediniformes

rays with bodies shaped like torpedoes

— Princeton's WordNet

Elasmobranchii, subclass Elasmobranchii, Selachii, subclass Selachii

sharks; rays; dogfishes; skates

— Princeton's WordNet

mountain lily, Lilium auratum

Japanese lily with golden rays

— Princeton's WordNet

radiopaque, radio-opaque

not transparent to X-rays or other forms of radiation

— Princeton's WordNet

reflection, reflexion, reflectivity

the ability to reflect beams or rays

— Princeton's WordNet

roentgenography, X-ray photography

radiography that uses X-rays to produce a roentgenogram

— Princeton's WordNet

radiopaque, radio-opaque

not transparent to X-rays or other forms of radiation

— Princeton's WordNet

incident

falling or striking of light rays on something

— Princeton's WordNet

reflection, reflexion, reflectivity

the ability to reflect beams or rays

— Princeton's WordNet

radiate

issue or emerge in rays or waves

— Princeton's WordNet

focused, focussed

(of light rays) converging on a point

— Princeton's WordNet

radiate

send out real or metaphoric rays

— Princeton's WordNet

mountain lily, Lilium auratum

Japanese lily with golden rays

— Princeton's WordNet

gamma knife

a machine that produces and focuses beams of gamma-rays at a specific location in the body, used to burn-up diseased tissues

— Wiktionary

diaheliotropism

A tendency of leaves or other plant organs to have their dorsal surface facing towards the rays of light.

— Wiktionary

Asteriated

radiated, with diverging rays; as, asteriated sapphire

— Webster Dictionary

Five-finger

a starfish with five rays, esp. Asterias rubens

— Webster Dictionary

Divergent

causing divergence of rays; as, a divergent lens

— Webster Dictionary

irradiance

The act of irradiating; emission of rays of light.

— Wiktionary

ray tracing

A computer graphics technique that produces realistic images by projecting imaginary light rays to determine which parts of an object should be illuminated.

— Wiktionary

X-ray spectrometer

A device for analyzing the chemical composition of substances using the characteristic spectral lines produced by their interaction with X-rays.

— Wiktionary

hodoscope

A device, consisting of multiple detectors, that is used to track the path of cosmic rays and other subatomic particles

— Wiktionary

microdiffraction

diffraction that uses X-rays focused to a spot size of one micron or less to achieve very high spatial resolution

— Wiktionary

heliograph

signal by means of a mirror and the using the sun's rays

— Princeton's WordNet

heliogram

a message transmitted by means of the sun's rays

— Princeton's WordNet

Rhinobatidae, family Rhinobatidae

primitive rays with guitar-shaped bodies

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

Rajidae, family Rajidae

bottom-dwelling tropical rays: skates

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

xeroradiography

radiography using X-rays and xerographic (rather than roentgenographic) techniques

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

Rajidae, family Rajidae

bottom-dwelling tropical rays: skates

— Princeton's WordNet

radiolucent

almost complete transparent to X-rays or other forms of radiation

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

Rhinobatidae, family Rhinobatidae

primitive rays with guitar-shaped bodies

— Princeton's WordNet

Pristidae, family Pristidae

large primitive rays with elongated snouts

— Princeton's WordNet

radiance, radiancy, shine, effulgence, refulgence, refulgency

the quality of being bright and sending out rays of light

— Princeton's WordNet

Pristidae, family Pristidae

large primitive rays with elongated snouts

— Princeton's WordNet

radiotherapy equipment

equipment used to treat diseases with x-rays or radioactivity

— Princeton's WordNet

rayless

having no parts resembling rays; not having ray flowers

— Princeton's WordNet

actinotrichium

Any of a group of hairlike fibres in the finfolds of fish larvae that develop into fin rays

— Wiktionary

Actinic

of or pertaining to actinism; as, actinic rays

— Webster Dictionary

Starry

arranged in rays like those of a star; stellate

— Webster Dictionary

Corradiation

a conjunction or concentration of rays in one point

— Webster Dictionary

Sunshade

anything used as a protection from the sun's rays

— Webster Dictionary

helianthus

Any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers

— Wiktionary

double refraction, birefringence

splitting a ray into two parallel rays polarized perpendicularly

— Princeton's WordNet

tan, suntan, sunburn, burn

a browning of the skin resulting from exposure to the rays of the sun

— Princeton's WordNet

double refraction, birefringence

splitting a ray into two parallel rays polarized perpendicularly

— Princeton's WordNet

Acanthopterygii, superorder Acanthopterygii

teleost fishes having fins with sharp bony rays

— Princeton's WordNet

tan, suntan, sunburn, burn

a browning of the skin resulting from exposure to the rays of the sun

— Princeton's WordNet

actinometry

measuring the intensity of electromagnetic radiation (especially of the sun's rays)

— Princeton's WordNet

Acanthopterygii, superorder Acanthopterygii

teleost fishes having fins with sharp bony rays

— Princeton's WordNet

Mobulidae, family Mobulidae

large rays lacking venomous spines: mantas

— Princeton's WordNet

mammography

a diagnostic procedure to detect breast tumors by the use of X rays

— Princeton's WordNet

radial, stellate, radiate

arranged like rays or radii; radiating from a common center

— Princeton's WordNet

radial, stellate, radiate

arranged like rays or radii; radiating from a common center

— Princeton's WordNet

tan, suntan, sunburn, burn

a browning of the skin resulting from exposure to the rays of the sun

— Princeton's WordNet

sunburn, erythema solare

redness of the skin caused by exposure to the rays of the sun

— Princeton's WordNet

Mobulidae, family Mobulidae

large rays lacking venomous spines: mantas

— Princeton's WordNet

radial, stellate, radiate

arranged like rays or radii; radiating from a common center

— Princeton's WordNet

radiate

having rays or ray-like parts as in the flower heads of daisies

— Princeton's WordNet

sunburn, erythema solare

redness of the skin caused by exposure to the rays of the sun

— Princeton's WordNet

tan, suntan, sunburn, burn

a browning of the skin resulting from exposure to the rays of the sun

— Princeton's WordNet

irradiate

To throw rays of light upon; to illuminate; to brighten; to adorn with luster.

— Wiktionary

X-ray diffraction

The scattering of X-rays by the regular lattice of atoms or molecules in a crystal.

— Wiktionary

hadrontherapy

Any of several forms of radiotherapy that uses beams of elementary particles instead of X-rays

— Wiktionary

caustic

The envelope of reflected or refracted rays of light for a given surface or object.

— Wiktionary

electric ray

Any of the groupof rays of the order Torpedodiniformes, which can produce an electric discharge

— Wiktionary

Raia

a genus of rays which includes the skates. See Skate

— Webster Dictionary

Actinoid

having the form of rays; radiated, as an actinia

— Webster Dictionary

terahertz radiation

Especially electromagnetic waves in the range 0.1-30 THz (or subranges there of, see T-rays or T-waves).

— Wiktionary

dynactinometer

An instrument for measuring the intensity of photogenic rays and computing the power of object glasses.

— Wiktionary

birefringence

the splitting of a ray of light into two parallel rays of perpendicular polarization by passage through an optically anisotropic medium

— Wiktionary

guitarfish

Any of the fish in the Rhinobatidae family of rays.

— Wiktionary

Lenard, Philipp Lenard

German physicist who studied cathode rays (1862-1947)

— Princeton's WordNet

radiation

energy that is radiated or transmitted in the form of rays or waves or particles

— Princeton's WordNet

Lenard, Philipp Lenard

German physicist who studied cathode rays (1862-1947)

— Princeton's WordNet

spiny-finned fish, acanthopterygian

a teleost fish with fins that are supported by sharp inflexible rays

— Princeton's WordNet

radiologist, radiotherapist

a medical specialist who uses radioactive substances and X-rays in the treatment of disease

— Princeton's WordNet