ir·ra·di·a·tion
n 1 a : the radiation of a physiologically active agent from a point of origin within the body : esp : the spread of a nervous impulse beyond the usual conduction path b : apparent enlargement of a light or bright object or surface when displayed against a dark background 2 a : exposure to radiation (as ultraviolet light, X rays, or alpha particles) b : application of radiation (as X rays or gamma rays) esp. for therapeutic purposes 3 : IRRADIANCE .
Similar sounding terms: ir·ri·ta·tion
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