['tɔmpiәn]
n.
木塞, 炮栓

[ noun ]
plug for the muzzle of a gun to keep out dust and moisture
<noun.artifact>

Tompion \Tom"pi*on\, n. [See {Tampios}]
1. A stopper of a cannon or a musket. See {Tampion}.

2. (Mus.) A plug in a flute or an organ pipe, to modulate the
tone. --Knight.

3. The iron bottom to which grapeshot are fixed.

Tampion \Tam"pi*on\, n. [F. tampon, tapon, tape, of Dutch or
German origin. See {Tap} a pipe or plug, and cf. {Tamp},
{Tampop}, {Tompion}.] [Written also {tampeon}, and
{tompion}.]
1. A wooden stopper, or plug, as for a cannon or other piece
of ordnance, when not in use.

2. (Mus.) A plug for upper end of an organ pipe.