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.
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)