Examples from the Web for eustachian
They are nearly all due to catarrhal infection of the middle ear through the Eustachian tube.The Science of Human Nature|William Henry Pyle
If the Eustachian tube is obstructed, the sound is fainter and more distant.
Note the Eustachian tubes extending from the mouth to the ears.Elementary Zoology, Second Edition|Vernon L. Kellogg
Adenoids will be described later; here they are mentioned only because they may press upon and close the Eustachian tubes.Physiology|Ernest G. Martin
This cavity communicates with the mouth by means of a duct called the Eustachian tube.The Dominion of the Air|J. M. Bacon