/ Dictionary / Index E ethyne: Meaning and Definition of Find definitions for: eth•yne Pronunciation: (eth'īn, e-thīn'), [key] — n. Chem. acetylene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ethyne (Thesaurus) ethyl urethane ethynyl Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language