Breadcrumb Home > Dictionary > Index C colon bacillus: Meaning and Definition of Find definitions for: co'lon bacil"lus Pronunciation: (kō'lun), [key] — Bacteriol. Bacteriol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Colón Archipelago colonel ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language