Irradiate Ir*ra"di*ate ([i^]r*r[=a]"d[i^]*[=a]t), v. t. [imp. & p. p. {Irradiated} ([i^]r*r[=a]"d[i^]*[=a]`t[e^]d); p. pr. & vb. n. {Irradiating} ([i^]r*r[=a]"d[i^]*[=a]`t[i^]ng).] [L. irradiatus, p. p. of irradiate. See {In-} in, and {Radiate}.] [1913 Webster] 1. To throw rays of light upon; to illuminate; to brighten; to adorn with luster. [1913 Webster]

Thy smile irradiates yon blue fields. --Sir W. Jones. [1913 Webster]

2. To enlighten intellectually; to illuminate; as, to irradiate the mind. --Bp. Bull. [1913 Webster]

3. To animate by heat or light. --Sir M. Hale. [1913 Webster]

4. To radiate, shed, or diffuse. [1913 Webster]

A splendid fa[,c]ade, . . . irradiating hospitality. --H. James. [1913 Webster]

5. To expose to radiation of any kind, especially {ionizing radiation}; as, to sterilize food by irradiating it with gamma rays; one can cause mutations in bacteria by irradiating them with ultraviolet light. [PJC]

The Collaborative International Dictionary of English. 2000.

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