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Noun: irradiation  i,rey-dee'ey-shun
  1. The condition of being exposed to radiation
     
  2. A column of light (as from a beacon)
    - beam, beam of light, light beam, ray, ray of light, shaft, shaft of light
     
  3. (physiology) the spread of sensory neural impulses in the cortex
     
  4. The apparent enlargement of a bright object when viewed against a dark background
     
  5. (Pavlovian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus
     
  6. (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
    - radiotherapy, radiation therapy, radiation, actinotherapy

Derived forms: irradiations

Type of: condition, generalisation [Brit], generalization, illusion, light, semblance, spread, spreading, status, stimulus generalisation [Brit], stimulus generalization, therapy, visible light, visible radiation

Encyclopedia: Irradiation