One of the mysteries of the English language finally explained.
An organic arsenic compound which induces vomiting and is irritating to the eyes and lungs, used in the form of an aerosol in chemical warfare, riot control, etc.; also called DM (diphenylaminechlorasine).
Early 20th century. From the name of Roger Adams, U.S. chemist, who apparently isolated the compound in 1918 + -ite.
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