/ Dictionary / Index P polyunsaturate: Meaning and Definition of Find definitions for: pol•y•un•sat•u•rate Pronunciation: (pol"ē-un-sach'ur-it, -u-rāt"), [key] — n. a polyunsaturated fat or fatty acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polytypic polyunsaturated Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language