/ Dictionary / Index O organic chemistry: Meaning and Definition of Find definitions for: organ'ic chem'istry Pronunciation: [key] the branch of chemistry, originally limited to substances found only in living organisms, dealing with the compounds of carbon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. organically organic disease Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language