/ Dictionary / Index P pyrene: Meaning and Definition of Find definitions for: py•rene Pronunciation: (pī'rēn, pī-rēn'), [key] — n. Bot. a putamen or stone, esp. when there are several in a single fruit; a nutlet. py•rene Pronunciation: (pī'rēn), [key] — n. Chem. a polycyclic, aromatic crystalline hydrocarbon, CH, consisting of four fused benzene rings, found in coal tar and believed to be carcinogenic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pyrene (Thesaurus) pyre Pyrenees Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language