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emission definition

emis·sion (ē mis̸h′ən, i-)

noun

  1. the act of emitting; issuance; specif.,
    1. the transmission of radio waves
    2. the ejection of electrons from a surface by heat, radiation, etc.
    3. a discharge of fluid from the body; esp., an involuntary discharge of semen
  2. something emitted; discharge

Etymology: L emissio < pp. of emittere

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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