Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An oily, colorless to violet or brown liquid, C2H2AsCl3, used to make a highly toxic gas weapon.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An organoarsenic compound used as a chemical weapon.

from The Century Dictionary and Cyclopedia

  • n. A titano-anti-monate of calcium occurring in minute yellow to brown octahedrons: found in the gravels of Tripuhy, Minas Geraes, Brazil.

Etymologies

After Winford Lee Lewis (1878-1943), American chemist.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Lewis +‎ -ite, after US chemist and soldier Winford Lee Lewis (1878–1943). (Wiktionary)

Examples

  • Conant had supervised the production of a poison gas (never used) called lewisite during World War I, and shortly after the outbreak of World War II, he was invited to join a government body created to oversee scientific contributions to military research.

    The Quiet American

  • The corps found an open flask containing traces of the chemical agent mustard, another blistering agent called lewisite and munition shells with more digging near a one-time Army chemical warfare station at American University.

    Denver Post: News: Breaking: Local

  • The Corps discovered an open flask containing traces of the chemical agent mustard, another blistering agent called lewisite and munition shells with more digging near a one-time Army chemical warfare station at American University.

    daytondailynews.com - News

  • In 2008, the arsenal temporarily closed to the public after the chemical agent lewisite was found.

    Rocky Mountain Arsenal Now Officially A Wildlife Refuge

  • Iran lay in financial and emotional ruins, with an entire generation killed in battle or horribly maimed by Iraq's western-supplied chemical weapons that included the burning agents mustard gas and lewisite, chlorine, cyanide, and a variety of deadly nerve gases.

    Eric Margolis: How Obama Can Further U.S.-Iran Relations

  • That's right, Pentagon leaders don't see the value next year in spending one thin dime to destroy or secure VX, soman, sarin, or lewisite/mustard nerve and blister agents from Russia or the former Soviet states.

    Barry Rosenberg: See No Evil

  • During the First World War, James Conant had been in charge of manufacturing lewisite, a war gas that smelled like geraniums.

    Human Smoke

  • He had set up a large lewisite factory near Cleveland, for which service he won a medal.

    Human Smoke

  • A boatload of lewisite had been on its way to Europe in 1918 when Germany capitulated.

    Human Smoke

  • Even after more than half a century on the seabed the shells 'contents -- mostly mustard gas and lewisite (both blister agents), as well as the nerve gas tabun -- may still be deadly.

    Roiling the Baltic Waters

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