/ Thesaurus / L Synonyms of luminous flux Find synonyms for: Noun1. luminous flux, radiant fluxusage: the rate of flow of light energyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language