1. (n.) One who, or that which, plunges; a diver.

2. (n.) A long solid cylinder, used, instead of a piston or bucket, as a forcer in pumps.

3. (n.) One who bets heavily and recklessly on a race; a reckless speculator.

4. (n.) A boiler in which clay is beaten by a wheel to a creamy consistence.

5. (n.) The firing pin of a breechloader.

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