Hypertext Webster Gateway: "plunger"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Plunger \Plun"ger\, n.
1. One who, or that which, plunges; a diver.
2. A long solid cylinder, used, instead of a piston or
bucket, as a forcer in pumps.
3. One who bets heavily and recklessly on a race; a reckless
speculator. [Cant]
4. (Pottery) A boiler in which clay is beaten by a wheel to a
creamy consistence. --Knight.
5. (Gun.) The firing pin of a breechloader.
{Plunger bucket}, a piston, without a valve, in a pump.
{Plunger pole}, the pump rod of a pumping engine.
{Plunger pump}, a pump, as for water, having a plunger,
instead of a piston, to act upon the water. It may be
single-acting or double-acting
From WordNet (r) 1.7 (wn)
plunger
n 1: someone who risks losses for the possibility of considerable
gains [syn: {speculator}]
2: someone who dives (into water) [syn: {diver}]
3: hand tool consisting of a stick with a rubber suction cup at
one end; used to clean clogged drains [syn: {plumber's
helper}]
4: mechanical device that has a plunging or thrusting motion
[syn: {piston}]
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