单词	eustachian tube
释义	eustachian tube noun eu·​sta·​chian tube yü-ˈstā-sh(ē-)ən-   also  -ˈstā-kē-ən- often capitalized E : 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 Example Sentences 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 Word History Etymology Bartolommeo Eustachio First Known Use 1741, in the meaning defined above Medical Definition eustachian tube noun often capitalized E : 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
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