irradiation

noun

1. 1

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

2. 2

   (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus

3. 3

   the apparent enlargement of a bright object when viewed against a dark background

4. 4

   (physiology) the spread of sensory neural impulses in the cortex

5. 5

   a column of light (as from a beacon)

6. 6

   the condition of being exposed to radiation