Cascabel
Cascabel , noun
[Sp. cascabel a little bell, also (from the shape), a knob at the breech end of a cannon.]
[See Illust. of Cannon.]
The projection in rear of the breech of a cannon, usually a knob or breeching loop connected with the gun by a neck. In old writers it included all in rear of the base ring. [See Illust. of Cannon.]