Lewis, Winford Lee (1878–1943), American chemist. As an officer in the United States Army Chemical Warfare Service during World War I, Lewis developed the poisonous gas lewisite in 1918. Later in life he did research for the Institute of American Meat Packers.
Medical Dictionary
lewisite
noun lew·is·ite \ˈlü-ə-ˌsīt\
Medical Definition of LEWISITE
: a colorless or brown vesicant liquid C2H2AsCl3 developed as a poison gas for war use
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