-on Hear it!

-on definition

-on (än)

  1. Etymology: < -on in argon

    an inert gas radon

  2. Etymology: < -on in ion

    a subatomic particle neutron

  3. Etymology: < -one

    1. a functional unit operon
    2. a unit of measure photon

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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