/ Dictionary / Index I isologous: Meaning and Definition of Find definitions for: i•sol•o•gous Pronunciation: (ī-sol'u-gus), [key] — adj. Chem. (of two or more organic compounds) chemically related but differing in composition other than by nCH. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isoline isologue Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language