Musculus tensor tympani originates in the cartilaginous part of the auditory (eustachian) tube and the walls of its hemi-canal just above the bony portion of the auditory tube and inserts in the handle of malleus. Action, draws the handle of the malleus medialward tensing the tympanic membrane to protect it from excessive vibration by loud sounds. Nerve supply, branches of trigeminal through the otic ganglion. Synonym: tensor typmpani, tensor muscle of tympanic membrane, Toynbee's muscle.
This is a spurious Latin term. For it to be a veritable Latin term, tensor (nominative case of a noun) would have to be either an adjective or the genitive (possessive) case of a noun.