petrotympanic fissure

[pĕt′rō-tĭm-pănĭk]

n.

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

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