petrous Hear it!

petrous definition

pet·rous (pe′trəs, pē′trəs)

adjective

  1. of or like rock; hard; stony

  2. Etymology: ML petrosus

    designating or of that part of the temporal bone which surrounds and protects the internal ear

Etymology: L petrosus, rocky < petra, rock < Gr

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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