\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. (Zo["o]l.) That portion of the interior of a spiral shell
   which can be seen by looking into the aperture.