centerboard

[sen-ter-bawrd, -bohrd]

cen·ter·board

[sen-ter-bawrd, -bohrd]
noun Nautical.
a pivoted fin keel that can be swung upward and aft within a watertight trunk when not in use.
Also called drop keel.
Compare daggerboard.


Origin:
1840–50, Americanism; center + board
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To centerboard

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Centerboard is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a gadget; dingus; thingumbob.
WordNet
centerboard

noun
a retractable fin keel used on sailboats to prevent drifting to leeward 
WordNet® 3.0, © 2006 by Princeton University.
Cite This Source
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