-ion Hear it!

-ion definition

-ion (ən)

  1. the act or condition of retrospection
  2. the result of retroaction

Etymology: < Fr or L: Fr -ion < L -io, nom., (gen. -ionis)

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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