groove of promontory of labyrinthine wall of tympanic cavity
Definition: a narrow branched groove running vertically over the surface of the promontory in the middle ear, lodging the tympanic plexus.
Synonym(s): sulcus promontorii cavitatis tympanicaeTA, sulcus of promontory of tympanic cavity
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Examples: glitazone, GI cocktail, etc.

