Tic (?), 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.
Tic douloureux (). [F., fr. tic a knack, a twitching + douloureux painful.] Med. Neuralgia in the face; face ague. See under Face.
© Webster 1913.