Webster’s Revised Unabridged Dictionary · 1913
Tic
Tic (tĭk), n. [F.] (Med.) A local and habitual convulsive motion of certain muscles; especially, such a motion of some of the muscles of the face; twitching; velication; — called also spasmodic tic. Dunglison.
Tic douloureux. [F., fr. tic a knack, a twitching + douloureux painful.] (Med.) Neuralgia in the face; face ague. See under Face.