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petromastoid in Medicine

petromastoid

(pĕt′rə-măstoid′)
adj.
  1. 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.