/ Dictionary / Index F flash spectrum: Meaning and Definition of Find definitions for: flash' spec"trum Pronunciation: [key] — Astron. Astron. the emission spectrum of the chromosphere of the sun, which dominates the solar spectrum in the seconds just before and after a total solar eclipse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. flash point flashtube Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language