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Plug

From Biology-Online Dictionary | Biology-Online Dictionary
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plug

1. Any piece of wood, metal, or other substance used to stop or fill a hole; a stopple.

2. A flat oblong cake of pressed tobacco.

3. A high, tapering silk hat.

4. A worthless horse.

5. A block of wood let into a wall, to afford a hold for nails. Fire plug, a street hydrant to which hose may be attached. Hawse plug, a tapering valve, which turns in a case like the plug of a faucet.

Origin: Akin to D. Plug, G. Pflock, Dan. Plok, plug, Sw. Plugg; cf. W. Ploc.