/ Dictionary / Index C colog: Meaning and Definition of Find definitions for: co•log Pronunciation: (kō'lôg, -log), [key] — n. Symbol, Math. cologarithm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. colocynth cologarithm Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language