/ Thesaurus / G Synonyms of gay lussac Find synonyms for: Noun1. Gay-Lussac, Joseph Louis Gay-Lussacusage: French chemist and physicist who first isolated boron and who formulated the law describing the behavior of gases under constant pressure (1778-1850)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dispel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language