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Noun radiation has 7 senses
  1. radiation - energy that is radiated or transmitted in the form of rays or waves or particles
    --1 is a kind of
    --1 has particulars:
     ionizing radiation; cosmic radiation; electromagnetic radiation, electromagnetic wave, nonparticulate radiation; solar radiation
    Derived form: verb radiate1
  2. radiation - the act of spreading outward from a central source
    --2 is a kind of
    emission, emanation
    --2 has particulars: bombardment
    Derived form: verb radiate3
  3. radiation sickness, radiation syndrome, radiation - 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"
    --3 is a kind of syndrome
  4. radiation, radioactivity - the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
    --4 is a kind of emission
    --4 has particulars: corpuscular radiation, particulate radiation
  5. radiation - the spread of a group of organisms into new habitats
    --5 is a kind of
    natural process, natural action, action, activity; spread, spreading
    --5 has particulars: adaptive radiation
    Derived form: verb radiate8
  6. radiation - a radial arrangement of nerve fibers connecting different parts of the brain
    --6 is a kind of
    neural structure
    Derived form: verb radiate3
  7. radiotherapy, radiation therapy, radiation, actinotherapy, irradiation - (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance
    --7 is a kind of therapy
    --7 has particulars: phototherapy; radium therapy, Curietherapy; X-ray therapy
radiant heating radiantance radiantly radiata radiate radiated radiates radiating radiation radiation radiation diagram radiation field radiation pattern radiation pressure radiation pyrometer radiation sickness radiation syndrome

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