eustachian tube Hear it!

eustachian tube definition

eu·sta·chian tube (yo̵̅o̅ stā′s̸hən, -stā′s̸hē ən, -stā′kē ən)

a slender tube between the middle ear and the pharynx, which serves to equalize air pressure on both sides of the eardrum

Etymology: after Bartolommeo Eustachio (1520-74), It anatomist

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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