irradiation has definitions from the fields of medicine,psychology,education,physics
1
[ noun ] the apparent enlargement of a bright object when viewed against a dark background

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illusion

2
[ noun ] (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus

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generalisation

3
[ noun ] (physiology) the spread of sensory neural impulses in the cortex

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spread physiology

4
[ noun ] (physics) a column of light (as from a beacon)
5
[ noun ] the condition of being exposed to radiation

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condition irradiate

6
[ noun ] (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance
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