Pronunciation: (tik), [key]
a. a sudden, spasmodic, painless, involuntary muscular contraction, as of the face.
b. See tic douloureux.
2. a persistent or recurrent behavioral trait; personal quirk: her distinctive verbal tics.
a suffix, equivalent in meaning to -ic, occurring in adjectives of Greek origin (analytic), used esp. in the formation of adjectives from nouns with stems in -sis: hematotic; neurotic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.