ärˈsēn, ˈärˌs- noun
( -s )
Etymology: International Scientific Vocabulary ars- + -ine
1. : a colorless extremely poisonous gas AsH 3 having an odor like garlic, burning with a bluish flame, and made by reaction of an arsenide (as zinc arsenide) with an acid and in other ways — see marsh test
2. : any of a class of very poisonous organic compounds derived from arsine that are analogous to the amines and phosphines — compare diphenylchloroarsine , lewisite