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sponson

[ spon-suhn ]
/ ˈspɒn sən /
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noun
a structure projecting from the side or main deck of a vessel to support a gun or the outer edge of a paddle box.
a buoyant appendage at the gunwale of a canoe to resist capsizing.
Aeronautics. a protuberance at the side of a flying-boat hull, designed to increase lateral stability in the water.
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Origin of sponson

First recorded in 1825–35; variant of expansion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use sponson in a sentence

British Dictionary definitions for sponson

sponson
/ (ˈspɒnsən) /

noun
navy an outboard support for a gun enabling it to fire fore and aft
a semicircular gun turret on the side of a tank
a float or flotation chamber along the gunwale of a boat or ship
a structural projection from the side of a paddle steamer for supporting a paddle wheel
a structural unit attached to a helicopter fuselage by fixed struts, housing the main landing gear and inflatable flotation bags

Word Origin for sponson

C19: perhaps from expansion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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