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drop-keel
drop-keel n.
Brit. 
/ˈdrɒpkiːl/
, /ˈdrɒpkiːl/U.S. /ˈdrɑpˌkil/
a movable keel which can be lowered below the bottom of a boat; a centre-board./ˈdrɑpˌkil/ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > parts of vessels > body of vessel > bottom or part under water > [noun] > keel and kelson > keel > types of
sliding keel1797
centreboard1828
bilge-keel1850
ram1851
rocker1859
sidebar keel1869
bar-keel1874
plate-keel1874
bilge-piece1880
fin1885
bulb-keel1893
fin-keel1893
ballast fin1894
bulb-fin1894
plate1895
drop-keel1896
1896 Westm. Gaz. 12 May 2/1 To steady the boat still further, it carries a water ballast, or a drop-keel.
drop-keel
drop-keel n. (a) a centre-board; (b) a projecting keel, as distinguished from a flat plate-keel.extracted from keeln.1<
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