| irradiation | (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance |
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| irradiation | (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus |
| irradiation | the apparent enlargement of a bright object when viewed against a dark background |
| irradiation | (physiology) the spread of sensory neural impulses in the cortex |
| irradiation | a column of light (as from a beacon) |
| irradiation | the condition of being exposed to radiation |