/ Dictionary / Index I isocyanate: Meaning and Definition of Find definitions for: i•so•cy•a•nate Pronunciation: (ī"su-sī'u-nāt"), [key] — n. Chem. a salt or ester of isocyanic acid. any compound containing the univalent group −NCO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isocyanate (Thesaurus) Isocrates isocyanic acid Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language