semidiurnal Hear it!

semidiurnal definition

semi·di·ur·nal (-dī ʉr′nəl)

adjective

  1. of, lasting, or performed in half a day
  2. occurring twice a day, as the tides

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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