I. pän-ˈtün noun
Etymology: French ponton, from Old French, from Latin ponton-, ponto
Date: 1690
1. : a flat-bottomed boat (as a lighter) ; especially : a flat-bottomed boat or portable float used in building a floating temporary bridge
2. : a float especially of a seaplane
II. noun
Etymology: perhaps alteration of vingt-et-un
Date: circa 1917
British : blackjack 5