EUSTACHIAN
\juːstˈe͡ɪʃən], \juːstˈeɪʃən], \j_uː_s_t_ˈeɪ_ʃ_ə_n]\
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By Daniel Lyons
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Discovered or described by, and named after, Eustachius, an Italian anatomist. The Eustachian tube, a small duet running from a cavity of the ear into the back part of the mouth. Eustachian valve, a fold of the lining membrane of the auricle.
By Nuttall, P.Austin.
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In anat., applied to a tube or canal extending from behind the soft palate to the tympanum of the ear, to which it conveys the air; eustachian valve, a fold of the lining membrane of the heart.
By Stormonth, James, Phelp, P. H.
By Henderson, I. F.; Henderson, W. D.