petrous

petrous definition - medical

pet·rous (pĕtˈrəs)

adjective
  1. Of stony hardness.
  2. Of or relating to the dense hard portion of the temporal bone that forms a protective case for the inner ear.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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