sponson
spon·son
noun \ˈspän(t)-sən\Definition of SPONSON
1
a : a projection (as a gun platform) from the side of a ship or a tank b : an air chamber along a canoe to increase stability and buoyancy
2
: a light air-filled structure or a winglike part protruding from the hull of a seaplane to steady it on water
Origin of SPONSON
perhaps by shortening & alteration from expansion
First Known Use: 1835
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