from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An organic compound, diphenylaminechlorarsine, used as a riot-control agent.
from The Century Dictionary and Cyclopedia
- n. A name given to a greenish-black mica found in Derby, Vermont; a variety of muscovite or common mica.
Named after Roger Adams, an American organic chemist. (Wiktionary)
After a cavalry charge, infantry, with fixed bayonets and adamsite gas, a riot control agent, entered the Bonus Army camps and successfully evicted veterans, families and camp followers.