Medical Dictionary

petromastoid pet·ro·mas·toid (pět'rə-mās'toid')
Of or relating to the petrous and the mastoid portions of the temporal bone of the skull.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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