Tampion n. : A wooden stopper, or plug, as for a cannon or other piece of ordnance, when not in use.

Tampion n. : A plug for upper end of an organ pipe.

Example:


Taxonomy
tampion, free encyclopedia, rubber, naval guns, barrels, guns, gun turrets, search, Unsourced, Mortars, wooden plug, metal, canvas, muzzle, artillery, works of art, cannons, vessels.

Defination from the web:
Tampion. From Wikipedia, the free encyclopedia. Jump to: navigation, search. This article does not cite any references or sources. ... A tampion is wooden plug, or a metal, canvas, rubber or plastic cover, for the muzzle of a gun. They can be found on both land based artillery and naval guns. ...