co- Hear it!

co- definition

co- (kō)

  1. together coact
  2. mutually, equally coextensive
  3. joint or jointly copilot, coauthor
  4. Math. complement of cosine

Etymology: var of com-, orig. occurring only before a vowel, h, or gn

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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