Lavoisier Antoine LaurentLa·voi·sier
, Antoine Laurent 1743–1794.
French chemist who isolated the major components of air, disproved the phlogiston theory by determining the role of oxygen in combustion, and devised a system of chemical nomenclature. Lavoisier was executed during the Reign of Terror.
colored engraving after
a 1788 painting by
Jacques Louis David