/ahr seen", ahr"seen, -sin/ , n. Chem.
1. Also called arseniuretted hydrogen . a colorless, flammable, slightly water-soluble gas, AsH 3 , having a fetid, garliclike odor, used in chemical warfare.
2. any derivative of this compound in which one or more hydrogen atoms are replaced by organic groups.
[ 1875-80; ARS(ENIC) + -INE 2 ]