tympanomastoid fissure tym·pa·no·mas·toid fissure (tĭm'pə-nō-mās'toid')
A fissure that separates the tympanic portion from the mastoid portion of the temporal bone and transmits the auricular branch of the vagus nerve. Also called auricular fissure.
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|