What does radiation mean?

Definitions for radiation
ˌreɪ diˈeɪ ʃənra·di·a·tion

Here are all the possible meanings and translations of the word radiation.

Princeton's WordNet

  1. radiation(noun)

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

  2. radiation(noun)

    the act of spreading outward from a central source

  3. radiation sickness, radiation syndrome, radiation(noun)

    syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours

    "he was suffering from radiation"

  4. radiation, radioactivity(noun)

    the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

  5. radiation(noun)

    the spread of a group of organisms into new habitats

  6. radiation(noun)

    a radial arrangement of nerve fibers connecting different parts of the brain

  7. radiotherapy, radiation therapy, radiation, actinotherapy, irradiation(noun)

    (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

Wiktionary

  1. radiation(Noun)

    The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.

    Etymology: From radiatio.

  2. radiation(Noun)

    The process of radiating waves or particles.

    Etymology: From radiatio.

  3. radiation(Noun)

    The transfer of energy via radiation (as opposed to convection or conduction)

    Etymology: From radiatio.

  4. radiation(Noun)

    Radioactive energy

    Etymology: From radiatio.

Webster Dictionary

  1. Radiation(noun)

    the act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness

    Etymology: [L. radiatio: cf. F. radiation.]

  2. Radiation(noun)

    the shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat

    Etymology: [L. radiatio: cf. F. radiation.]

Freebase

  1. Radiation

    In physics, radiation is a process in which energetic particles or energetic waves travel through a vacuum, or through matter-containing media that are not required for their propagation. Waves of a mass filled medium itself, such as water waves or sound waves, are usually not considered to be forms of "radiation" in this sense. Radiation can be classified as either ionizing or non-ionizing according to whether it ionizes or does not ionize ordinary chemical matter. The word radiation is often colloquially used in reference to ionizing radiation, but the term radiation may correctly also refer to non-ionizing radiation as well. The particles or waves radiate from a source. This aspect leads to a system of measurements and physical units that are applicable to all types of radiation. Because radiation expands as it passes through space, and as its energy is conserved, the power of all types of radiation follows an inverse-square law in relation to the distance from its source. Both ionizing and non-ionizing radiation can be harmful to organisms and can result in changes to the natural environment. In general, however, ionizing radiation is far more harmful to living organisms per unit of energy deposited than non-ionizing radiation, since the ions that are produced, even at low radiation powers, have the potential to cause DNA damage. By contrast, most non-ionizing radiation is harmful to organisms only in proportion to the thermal energy deposited, and is conventionally considered harmless at low powers that do not produce a significant temperature rise. Ultraviolet radiation in some aspects occupies a middle ground, as it has some features of both ionizing and non-ionizing radiation. Although nearly all of the ultraviolet spectrum that penetrates the Earth's atmosphere is non-ionizing, this radiation does far more damage to many molecules in biological systems than can be accounted for by heating effects. These properties derive from ultraviolet's power to alter chemical bonds, even without having quite enough energy to ionize atoms.

U.S. National Library of Medicine

  1. 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.

The Standard Electrical Dictionary

  1. Radiation

    The traveling or motion of ether waves through space. [Transcriber's note: The modern term corresponding to this definition is photons. The modern concept of radiation also includes particles-- neutrons, protons, alpha (helium) and beta (electrons) rays and other exotic items.]

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'radiation' in Nouns Frequency: #2018

How to pronounce radiation?

  1. Alex
    Alex
    US English
    Daniel
    Daniel
    British
    Karen
    Karen
    Australian
    Veena
    Veena
    Indian

How to say radiation in sign language?

  1. radiation

Numerology

  1. Chaldean Numerology

    The numerical value of radiation in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of radiation in Pythagorean Numerology is: 1

Examples of radiation in a Sentence

  1. Danny Thomas:

    We follow Ali for the rest of her life so that we know what her chemo or radiation, whatever treatment she had, how that has affected her life, how's her hearing, how's her eyesight, how's her liver, is she going to be able to have children?

  2. Marius Cautun:

    This phenomenon will generate powerful jets of high energy radiation emanating from just outside the black hole, while this will not affect Solar System, there is a small chance that we might not escape unscathed from the collision between the two galaxies which could knock us out of Milky Way and into interstellar space.

  3. Tari King:

    The risks and benefits of local therapy -- surgery plus radiation -- for breast cancer are favorable when surgery is being performed for curative intent.

  4. Wouter Vogel:

    For most patients, it should technically be possible to avoid delivering radiation to this newly discovered location of the salivary gland system in the same way we try to spare known glands, our next step is to find out how we can best spare these new glands and in which patients. If we can do this, patients may experience less side effects which will benefit their overall quality of life after treatment.

  5. Frdric Delsuc:

    Contrary to what is generally assumed about the distinctiveness of glyptodonts, our analyses indicate that they originated only some 35 million years ago, well within the armadillo radiation, taxonomically, they should be regarded as no more than another subfamily of armadillos, which we can call Glyptodontinae.

Images & Illustrations of radiation

  1. radiationradiationradiationradiationradiation

Popularity rank by frequency of use

radiation#1#4585#10000

Translations for radiation

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