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 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, "Parents need to know: When kids fly solo, flight attendants aren’t baby sitters," 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

Keep scrolling for more

Learn More about eustachian tube

Time Traveler for eustachian tube

Time Traveler

The first known use of eustachian tube was in 1741

See more words from the same year

Statistics for eustachian tube

Cite this Entry

“Eustachian tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eustachian%20tube. Accessed 26 Jan. 2021.

Keep scrolling for more

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

Comments on eustachian tube

What made you want to look up eustachian tube? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!