A dark oily liquid producing an irritant gas that causes blisters, developed for use in chemical warfare.
- ‘Among the CW agents produced were phosgene, mustard, lewisite, hydrogen cyanide, and diphenyl cyanarsine.’
- ‘The chemicals, confiscated from Hitler's Third Reich at the end of the second world war, were mustard gas, phosgene, tabun and lewisite, all of which can inflict appalling injuries.’
- ‘This target list usually included sarin, soman, mustard, lewisite, cyclosarin, and fats, oils and wax to name a few.’
1920s: named after Winford L. Lewis (1878–1943), American chemist.
We take a look at several popular, though confusing, punctuation marks.