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English word
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WORDNET DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun eustachian tube has 1 sense
- eustachian tube(n = noun.body) auditory tube - either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrum; is a kind of salpinx
is a part of middle ear, tympanic cavity, tympanum
OXFORD DICTIONARY
eustachian tube, n. Anat. a tube leading from the pharynx to the cavity of the middle ear and equalizing the pressure on each side of the eardrum.
Etymology
L Eustachius = B. Eustachio, It. anatomist d. 1574