Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to facial spasm: Hemifacial spasm
involuntary twitching of the facial muscles, sometimes unilateral.
fa·cial tic(fā'shăl tik)
Spasm of the muscles supplied by the facial nerve, affecting one side of the face or the region around the eye.See: cranial nerve; tic
See also: spasm