irradiation Hear it!

irradiation definition

ir·ra·dia·tion (-ā′s̸hən)

noun

  1. an irradiating or being irradiated; esp.,
    1. exposure to radiation
    2. emission of radiant energy
  2. irradiance (sense )
  3. Optics the apparent enlargement of a brightly lighted object seen against a dark background

Etymology: Fr < ML irradiatio

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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