/ Dictionary / Index P pyrone: Meaning and Definition of Find definitions for: py•rone Pronunciation: (pī'rōn, pī-rōn'), [key] — n. Chem. either of two heterocyclic ketones having the formula CHO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyromucic aldehyde pyronine Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language