Medical Definition of petrotympanic fissure
: a narrow transverse slit dividing the glenoid fossa of the temporal bone
— called also Glaserian fissure
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Cite this Entry
“Petrotympanic fissure.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/petrotympanic%20fissure. Accessed 23 Oct. 2021.
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