/ Dictionary / Index I ignescent: Meaning and Definition of Find definitions for: ig•nes•cent Pronunciation: (ig-nes'unt), [key] — adj. emitting sparks of fire, as certain stones when struck with steel. bursting into flame. —n. an ignescent substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ignescent (Thesaurus) igneous ignimbrite Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language