1. either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrum; [syn: Eustachian tube, auditory tube]
WordNet (r) 3.0 (2006):
auditory tube
n 1: either of the paired tubes connecting the middle ears to
the nasopharynx; equalizes air pressure on the two sides of
the eardrum [syn: Eustachian tube, auditory tube]