datum plane

Variant of datum

datum definition

da·tum (dāt′əm, dat′-; Brit also dä′təm)

noun pl. data da′ta (-ə) or datums da′·tums

  1. something known or assumed; information from which conclusions can be inferred
  2. a real or assumed thing, used as a basis for calculations or measurements, as a level (also datum plane) from which elevations and depths are measured in surveying

Etymology: L, what is given, neut. of datus: see date

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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