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sponson

 - 2 dictionary results

spon⋅son

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

Origin:
1825–35; var. of expansion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To sponson
spon·son   (spŏn'sən)   
n.  
  1. Any of several structures that project from the side of a boat or ship, especially a gun platform.

  2. A short, curved, air-filled projection on the hull of a seaplane, imparting stability in the water.


[Perhaps alteration of expansion.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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