A chemical weapon such as a poison gas shell, bomb, or grenade that releases toxic gas upon exploding.

a room designed for execution or killing by means of poisonous gas

chemical warfare involving the use of poisonous gases to kill or incapacitate people and livestock or to destroy crops

a highly toxic chemical gas used as a weapon, specifically dichlorodiethyl sulfide; also called [[芥子气|芥子氣|jie4 zi3 qi4]]