/ Dictionary / Index C colicin: Meaning and Definition of Find definitions for: col•i•cin Pronunciation: (kol'u-sin), [key] — n. Pharm. any bacteriocin produced by certain strains of Escherichia coli and having a lethal effect on strains other than the producing strain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. colic colicinogen Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language