petrotympanic fissure

[ pĕt′rō-tĭm-pănĭk ]

n.

A fissure between the tympanic and petrous portions of the temporal bone.glaserian fissure

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