/ Dictionary / Index E elastomer: Meaning and Definition of Find definitions for: e•las•to•mer Pronunciation: (i-las'tu-mur), [key] — n. Chem. an elastic substance occurring naturally, as natural rubber, or produced synthetically, as butyl rubber or neoprene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: elastomer (Thesaurus) elastin elate Related Content Daily Word Quiz: ingenuity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language