||Fau"ces (?), n. pl. [L.] 1. (Anat.) 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.

2. (Bot.) The throat of a calyx, corolla, etc.

3. (Zoöl.) That portion of the interior of a spiral shell which can be seen by looking into the aperture.