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Medical Definition of Petrotympanic fissure
1. A fissure between the tympanic and petrous portions of the temporal bone; it transmits the chorda tympani nerve through a small patent portion, the anterior canaliculus of the chorda tympani. Synonym: fissura petrotympanica, glaserian fissure. (05 Mar 2000)
Lexicographical Neighbors of Petrotympanic Fissure
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