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Radiation

//ˌɹæɪ.diˈæɪ.ʃən// noun

Definitions

Noun
  1. 1
    The shooting forth of anything from a point or surface, like diverging rays of light. countable, uncountable

    "The radiation of love from the crowd was addictive to the young singer-songwriters."

  2. 2
    (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance wordnet
  3. 3
    The shooting forth of anything from a point or surface, like diverging rays of light.; Ellipsis of electromagnetic radiation. abbreviation, alt-of, countable, ellipsis, often, uncountable

    "heat radiation"

  4. 4
    the act of spreading outward from a central source wordnet
  5. 5
    The process of radiating waves or particles. countable, uncountable
Show 8 more definitions
  1. 6
    a radial arrangement of nerve fibers connecting different parts of the brain wordnet
  2. 7
    The transfer of energy via radiation. countable, uncountable
  3. 8
    the spread of a group of organisms into new habitats wordnet
  4. 9
    Radioactive energy. countable, uncountable

    "It's Christmas at ground zero / And if the radiation level's OK / I'll go out with you / To see all the new / Mutations on New Year's Day"

  5. 10
    energy that is radiated or transmitted in the form of rays or waves or particles wordnet
  6. 11
    A rapid diversification of an ancestral species into many new forms. countable

    "So the question is: have plants and animals retained over this huge amount of time—whole radiations of mammals have come and gone in this period—have they retained these potentially costly characteristics?"

  7. 12
    the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay wordnet
  8. 13
    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 wordnet

Etymology

Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion.

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