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(medicine) the treatment of diseases like cancer using radiation from a radioactive source
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
(physiology) the spread of sensory neural impulses in the cortex
a beam or column of light emanating from a source
the process or state of being subjected to radiation