sinus tympani


tym·pan·ic si·nus

[TA] a depression in the tympanic cavity posterior to the tympanic promontory. Synonym(s): sinus tympani [TA]

sinus tympani

A recess in the medial wall of the tympanic cavity beside the promontory and adjacent to the round window. The sinus tympani can be > 3 mm deep. See also: sinus