/ Thesaurus / S Synonyms of solar constant Find synonyms for: Noun1. solar constant, rateusage: the rate at which radiant solar energy is received at the outer layer of the earth's atmosphereWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language