Chemical weapon
From Tardis Wiki, the free Doctor Who reference
A chemical weapon was a device which used chemicals.
On Earth, chemical weapons were tested in Dead Loch (PROSE: Harry Sullivan's War) and on Gravonax Island. (AUDIO: Night Thoughts) Chemical weapons were developed at A. H. Millington's base. (TV: The Curse of Fenric)
On Skaro, chemical weapons were used in the first century of the Thousand Year War, which resulted in the creation of the Mutos. (TV: Genesis of the Daleks)
