noun Etymology: perhaps by shortening & alteration from expansion Date: 1835 1. a projection (as a gun platform) from the side of a ship or a tank, an air chamber along a canoe to increase stability and buoyancy, a light air-filled structure or a winglike part protruding from the hull of a seaplane to steady it on water
SPONSON
Meaning of SPONSON in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012