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