tympanic sulcus

tympanic sulcus

[TA]
the groove on the inner aspect of the tympanic part of the temporal bone in which the tympanic membrane is fixed.

tympanic sulcus

Etymology: Gk, tympanon, drum; L, sulcus, furrow
a narrow circular groove at the medial end of the osseous part of the external acoustic meatus that holds the tympanic membrane.