01 n. pl. The narrow passage from the mouth to the pharynx, situated between the soft palate and the base of the tongue; -- called also the isthmus o…
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1.
The narrow passage from the mouth to the pharynx, situated between the soft palate and the base of the tongue; -- called also the isthmus of the fauces. On either side of the passage two membranous folds, called the pillars of the fauces, inclose the tonsils.(Anat.) Also: isthmus of the fauces
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2.
The throat of a calyx, corolla, etc.(Bot.)
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3.
That portion of the interior of a spiral shell which can be seen by looking into the aperture.(Zool.)