eustachian tube

noun, often capitalized E
eu·​sta·​chian tube | \ yü-ˈstā-sh(ē-)ən- How to pronounce eustachian tube (audio) also -ˈstā-kē-ən- \

Definition of eustachian tube

: a bony and cartilaginous tube connecting the middle ear with the nasopharynx and equalizing air pressure on both sides of the tympanic membrane

called also auditory tube

— see ear illustration

Examples of eustachian tube in a Sentence

Recent Examples on the Web There are several reason why a eustachian tube may not work properly. Dr. Keith Roach, oregonlive, 7 Mar. 2022 The eustachian tube is about 36 mm (about 1 1/2 inches) long and connects the middle ear with the throat. Dr. Keith Roach, oregonlive, 7 Mar. 2022 Your difficulty in clearing your ears is due to the direction of the airflow in your eustachian tube. John Cox, USA TODAY, 7 Oct. 2021 The rapid change in cabin air pressure causes an imbalance in the eustachian tube — a narrow, inner-ear passage that regulates air pressure. Elliott Hester, Los Angeles Times, 5 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eustachian tube.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of eustachian tube

1741, in the meaning defined above

History and Etymology for eustachian tube

Bartolommeo Eustachio

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Time Traveler for eustachian tube

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The first known use of eustachian tube was in 1741

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Dictionary Entries Near eustachian tube

eustachian

eustachian tube

Eustachio

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Cite this Entry

“Eustachian tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eustachian%20tube. Accessed 26 Jun. 2022.

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More Definitions for eustachian tube

eustachian tube

noun, often capitalized E

Medical Definition of eustachian tube

: a bony and cartilaginous tube connecting the middle ear with the nasopharynx and equalizing air pressure on both sides of the tympanic membrane

called also auditory tube, pharyngotympanic tube

More from Merriam-Webster on eustachian tube

Britannica.com: Encyclopedia article about eustachian tube

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