/ Dictionary / Index C cloxacillin: Meaning and Definition of Find definitions for: clox•a•cil•lin Pronunciation: (klok"su-sil'in), [key] — n. Pharm. a semisynthetic penicillin, CHClNNaOS, used chiefly against penicillin-resistant staphylococcal infections. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clown white cloy Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language