tympanomastoid fissure

Medical Dictionary

tympanomastoid fissure tym·pa·no·mas·toid fissure (tĭm'pə-nō-mās'toid')
n.
A fissure that separates the tympanic portion from the mastoid portion of the temporal bone and transmits the auricular branch of the vagus nerve. Also called auricular fissure.

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