irradiation : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: irradiation	by the DICT Development Group
2 results for irradiation
From WordNet (r) 3.0 (2006) [wn]:
irradiation n the condition of being exposed to radiation a column of light (as from a beacon) Synonym(s): beam, beam of light, light beam, ray, ray of light, shaft, shaft of light, irradiation (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 Synonym(s): radiotherapy, radiation therapy, radiation, actinotherapy, irradiation
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Irradiation \Irra`dia"tion\, n. [Cf. F. irradiation.] 1. Act of irradiating, or state of being irradiated. 2. Illumination; irradiance; brilliancy. --Sir W. Scott. 3. Fig.: Mental light or illumination. --Sir M. Hale. 4. (Opt.) The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, esp. when a little out of focus.