the condition of being exposed to radiation

a column of light (as from a beacon)

[ Syn: beam , beam of light , light beam , ray , ray of light , shaft , shaft of light ]

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

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

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

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

[ Syn: radiotherapy , radiation therapy , radiation , actinotherapy ]