/ Dictionary / Index M minocycline: Meaning and Definition of Find definitions for: min•o•cy•cline Pronunciation: (min"ō-sī'klēn, -klin) [key] — n. Pharm. a long-acting, broad-spectrum, semisynthetic antibiotic drug, CHNO, derived from tetracycline. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: minocycline (Thesaurus) Minoan minor Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language