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Noun, No-adjective
1. Eustachian tube
Wikipedia definition
2. Eustachian tubeThe Eustachian tube /juːˌsteɪ. ʃənˈtjuːb/, also auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm long. It is named after the sixteenth-century anatomist Bartolomeo Eustachi. Some modern medical books call this the pharyngotympanic tube.
Read “Eustachian tube” on English Wikipedia
Read “耳管” on Japanese Wikipedia
Read “Eustachian tube” on DBpedia

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