Hypertext Webster Gateway: "centerboard"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Centerboard \Cen"ter*board`\, Centreboard \Cen"tre*board\,, n.
(Naut.)
A movable or sliding keel formed of a broad board or slab of
wood or metal which may be raised into a water-tight case
amidships, when in shallow water, or may be lowered to
increase the area of lateral resistance and prevent leeway
when the vessel is beating to windward. It is used in vessels
of all sizes along the coast of the United States
From WordNet (r) 1.7 (wn)
centerboard
n : a retractable fin keel used on sailboats to prevent drifting
to leeward [syn: {centreboard}, {drop keel}, {sliding
keel}]
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.