tertium quid Hear it!

tertium quid definition

ter·tium quid (tʉr′s̸hē əm kwid′)

something of uncertain or unclassifiable nature, related to, but distinct from, two, usually opposite, things

Etymology: L, lit., third something

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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