\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}.
--Dunglison.

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