Pontoon (boat)
WordNet
noun
(1) A float supporting a seaplane
(2) (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge
WiktionaryText
Etymology 1
From Old French ponton, from Latin ponto (‘ferryboat’), from pons (‘bridge’).
Noun
- A flat-bottomed boat used as a support for a temporary bridge.
- A floating structure supporting a bridge or dock.
- A box used to raise a sunken vessel.
- A float of a seaplane.
Etymology 2
Probably from vingt-un, an obsolete variant of vingt-et-un, from French, literally ‘twenty-one’.
Noun
- : A card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it.