/ Dictionary / Index C carbenicillin: Meaning and Definition of Find definitions for: car•ben•i•cil•lin Pronunciation: (kär"ben-u-sil'in), [key] — n. Pharm. a semisynthetic penicillin, CHNNaOS, used against certain bacteria, esp. those involved in urinary tract infections. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. carbene carbide Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language