"chemical weapon." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/chemical-weapon>.
chemical weapon. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/chemical-weapon
A chemical agent or toxin, such as mustard gas, lewisite, or sarin, that has been prepared for release on the battlefield or within a civilian population in sufficient concentration to cause widespread illness or death.