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English definition of “Eustachian tube”

Eustachian tube

noun [C]     /juːˌsteɪ.ʃənˈtjuːb/ US  /-ˈtuːb/ specialized
either of the two passages between the middle ear and the back of the nose that open to allow pressure to be kept equal on both sides of the eardrum The ear
(Definition of Eustachian tube noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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