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spon·son
 sponson
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- pronunciation:
- span
s
 n
| part of speech: |
noun |
| definition 1: |
a structure projecting from the side of a ship or boat, esp. a gun platform, or an air chamber on the gunwale of a canoe that prevents capsizing.
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| definition 2: |
an air-filled projection on the hull of a seaplane that ensures stability in the water.
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