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Medical Definition of Recessus infundibuliformis
1. A slitlike depression in the membranous (non-muscular) pharyngeal wall extending posterior to the opening of the auditory (eustachian) tube. Synonym: recessus pharyngeus, recessus infundibuliformis, Rosenmuller's fossa, Rosenmuller's recess. (05 Mar 2000)