Pontoon

[pon-toon] /pɒnˈtun/

noun
1.
Military. a boat or some other floating structure used as one of the supports for a temporary bridge over a river.
2.
a float for a derrick, landing stage, etc.
3.
Nautical. a float for raising a sunken or deeply laden vessel in the water; a camel or caisson.
4.
a seaplane float.
[pon-toon] /pɒnˈtun/
noun, British.
1.
the card game twenty-one.
/pɒnˈtuːn/
noun
1.

2.
(nautical) a float, often inflatable, for raising a vessel in the water
/pɒnˈtuːn/
noun
1.
Also called (esp US) twenty-one, vingt-et-un. a gambling game in which players try to obtain card combinations worth 21 points
2.
(in this game) the combination of an ace with a ten or court card when dealt to a player as his first two cards
n.

“flat-bottomed boat” (especially one to support a temporary bridge), 1670s, from French pontoon, from Old French ponton (14c.) “bridge, drawbridge, boat-bridge; flat-bottomed boat,” from Latin pontonem (nominative ponto) “flat-bottomed boat,” from pons “bridge” (see pons). Pontoon bridge is first recorded 1778.

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