eustachian

adjective

eu·​sta·​chian

yüˈstāshən also -āshēən or -ākēən

often capitalized

: of or relating to Eustachio or to the eustachian tube : located in or adjoining the eustachian tube

Word History

Etymology

Bartolommeo Eustachio †1574 Italian anatomist + English -an

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