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Eustachian tube

[yoo-stey-shuh n, -stey-kee-uh n] /yuˈsteɪ ʃən, -ˈsteɪ ki ən/
noun, Anatomy
1.
a canal extending from the middle ear to the pharynx; auditory canal.
Origin
1735-1745
1735-45; named after Eustachio; see -an
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for eustachian-tube

Eustachian tube

/juːˈsteɪʃən/
noun
1.
a tube that connects the middle ear with the nasopharynx and equalizes the pressure between the two sides of the eardrum
Word Origin
C18: named after Bartolomeo Eustachio, 16th-century Italian anatomist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for eustachian-tube

Eustachian tube

n.

so called for Italian physician Bartolomeo Eustachio (d.1574), who discovered the passages from the ears to the throat. His name is from Latin Eustachius (see Eustace).

Online Etymology Dictionary, © 2010 Douglas Harper
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eustachian-tube in Medicine

eustachian tube n.
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. Also called auditory tube, salpinx.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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eustachian-tube in Science
eustachian tube
  (y-stā'shən)   
A slender tube that connects the middle ear with the upper part of the pharynx, serving to equalize air pressure on either side of the eardrum.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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eustachian-tube in Culture
Eustachian tube [(yooh-stay-shuhn, yooh-stay-kee-uhn)]

A tube made up of bone and cartilage that connects the middle ear to the back of the mouth.

Note: Swallowing during airplane takeoffs and landings allows air to move through the Eustachian tube to equalize pressure across the eardrum, causing the ears to “pop.”
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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