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. radiationnoun

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

  2. radiationnoun

    the act of spreading outward from a central source

  3. radiation sickness, radiation syndrome, radiationnoun

    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, radioactivitynoun

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

  5. radiationnoun

    the spread of a group of organisms into new habitats

  6. radiationnoun

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

  7. radiotherapy, radiation therapy, radiation, actinotherapy, irradiationnoun

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

Wiktionary

  1. radiationnoun

    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. radiationnoun

    The process of radiating waves or particles.

    Etymology: From radiatio.

  3. radiationnoun

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

    Etymology: From radiatio.

  4. radiationnoun

    Radioactive energy

    Etymology: From radiatio.

Webster Dictionary

  1. Radiationnoun

    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. Radiationnoun

    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?

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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. Thomas Boothby:

    Tardigrades are a group of microscopic animals that are renowned for their ability to survive a number of extreme stresses, some of the things that tardigrades can survive include being dried out, being frozen and being heated up past the boiling point of water. They can survive thousands of times as much radiation as we can and they can go for days or weeks with little or no oxygen.

  2. Richard Lustberg:

    While I may be rooting for the Patriots at the Super Bowl, it's not going to end my life, it's not chemotherapy or radiation, so really, it's not going to have any effect on our life. ... If we are just talking about your regular, everyday kind of effect on my life : none !

  3. Rashid Alimov:

    A fire approaching a nuclear or hazardous radiation facility is always a risk, in this case we're hoping for rain tomorrow.

  4. Jesse Selber:

    He had series of cancers of the scalp and skull that were treated with various surgeries and radiation that left him with a large wound that was all the way down to his brain.

  5. Dan Sosin:

    These runs were routinely sent back for additional radiation. It should have been seen for what it was: an indication that the margin of safety with the method was not sufficient.

Images & Illustrations of radiation

  1. radiationradiationradiationradiationradiation

Popularity rank by frequency of use

radiation#1#4585#10000

Translations for radiation

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