Tri-fā'cial, a.
a. [Prefix tri, q. v., and facial.] (Anat.) Of, pertaining to, or characterizing, the fifth pair of cerebral nerves, as formed chiefly of three nerves principally supplying the forehead, face, and skin of the jaw.
a. [Prefix tri, q. v., and facial.] (Anat.) Of, pertaining to, or characterizing, the fifth pair of cerebral nerves, as formed chiefly of three nerves principally supplying the forehead, face, and skin of the jaw.