octad Hear it!

octad definition

oc·tad (äk′tad′)

noun

  1. a series or group of eight
  2. Chem. an element, atom, or radical with a valence of eight

Etymology: Gr oktas (gen. oktados) < oktō, eight

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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