Pronunciation: (tik),[key] —n. 1. Pathol. 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.