arsenious
— Tillægsord
– Engelsk
~ relating to compounds in which arsenic is trivalent
arsenopyrite
— Navneord
– Engelsk
~ a silver-white or grey ore of arsenic
arsenous anhydride
— Navneord
– Engelsk
~ a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer