pharyngeal opening of pharyngotympanic tube
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On the lateral wall of the nasal part of the pharynx is the pharyngeal opening of auditory tube (pharyngeal ostium), somewhat triangular in shape, and bounded behind by a firm prominence, the torus or cushion, caused by the medial end of the cartilage of the tube which elevates the mucous membrane. [ http://en.wikipedia.org/wiki/Pharyngeal_opening_of_auditory_tube ]
Synonyms: pharyngeal ostium of pharyngotympanic tube pharyngeal orifice of pharyngotympanic tube ostium pharyngeum tubae auditoriae pharyngeal tubal ostium ostium pharyngeum tubae auditivae pharyngeal orifice of auditory tube pharyngeal opening of auditory tube pharyngeal opening of eustachian tube pharyngeal orifice of eustachian tube pharyngeal ostium of auditory tube pharyngeal ostium of eustachian tube