phosphonium Hear it!

phosphonium definition

phos·pho·nium (fäs fō′nē əm)

noun

the monovalent radical PH, which is related to PH as the ammonium radical NH is related to NH

Etymology: ModL: see phosph(o)- & -onium

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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