Wiktionary
n. An organoarsenic compound used as a chemical weapon.
Wikipedia
Lewisite (L) is an organoarsenic compound. It was once manufactured in the U.S., Japan, and Germany for use as a chemical weapon, acting as a vesicant (blister agent) and lung irritant. Although colorless and odorless, impure samples of lewisite are a yellow, brown, violet-black, green, or amber oily liquid with a distinctive odor that has been described as similar to geraniums.
Usage examples of "lewisite".
Remo and Chiun pursued their end of the La Plomo investigation, Smith had been following the trail of the Lewisite gas that had been loosed on the defenseless Missouri town.
The same man pictured in FBI wanted posters for having acquired the Lewisite gas that later wiped out the population of La Plomo, Missouri.
European jungle as the poison gas called Lewisite and the shattered bodies of children killed in the bombardment of an open town.
The same is true of Lewisite, which can be produced in liquid or vapor form.
Exposure to Lewisite causes an immediate burning or pain in the eyes, nose, and skin.
There is no vaccine for mustard or Lewisite, and there is no antidote for mustard agents.
However, there is an antidote for Lewisite, known as British anti-Lewisite.
If you were exposed to Lewisite, flush your skin with a very diluted amount of household bleach, then wash thoroughly with soap and water.