eustachian tubeeu·sta·chian tube
[alsoE- t-] a slender tube between the middle ear and the pharynx, which serves to equalize air pressure on both sides of the eardrum
Origin of eustachian tubeafter Bartolomeo Eustachio (1520-74), Italian anatomist
or Eu·sta·chian tube
A slender tube that connects the tympanic cavity with the nasal part of the pharynx and serves to equalize air pressure on either side of the eardrum.
Origin of eustachian tubeAfterBartolomeo Eustachio
(plural Eustachian tubes)
Named after the Italian scientist B. Eustachio