/ Dictionary / Index X xenon hexafluoride: Meaning and Definition of Find definitions for: xe'non hexafluo'ride Pronunciation: [key] — Chem. Chem. a colorless, crystalline compound, XeF, that melts at 50°C to a yellow liquid, and boils at 75°C. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xenon arc xenon tetrafluoride Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language