Keeled over

keel

1 [keel]
noun
1.
Nautical. a central fore-and-aft structural member in the bottom of a hull, extending from the stem to the sternpost and having the floors or frames attached to it, usually at right angles: sometimes projecting from the bottom of the hull to provide stability.
2.
Literary. a ship or boat.
3.
a part corresponding to a ship's keel in some other structure, as in a dirigible balloon.
4.
(initial capital letter) Astronomy. the constellation Carina.
5.
Botany, Zoology. a longitudinal ridge, as on a leaf or bone; a carina.
6.
Also called brace molding. Architecture. a projecting molding the profile of which consists of two ogees symmetrically disposed about an arris or fillet.
verb (used with object), verb (used without object)
7.
to turn or upset so as to bring the wrong side or part uppermost.
Verb phrases
8.
keel over,
a.
to capsize or overturn.
b.
to fall as in a faint: Several cadets keeled over from the heat during the parade.
Idioms
9.
on an even keel, in a state of balance; steady; steadily: The affairs of state are seldom on an even keel for long.

Origin:
1325–75; 1895–1900 for def 8; Middle English kele < Old Norse kjǫlr; cognate with Old English cēol keel, ship; see keel2

keeled, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
keel1 (kiːl)
 
n
1.  one of the main longitudinal structural members of a vessel to which the frames are fastened and that may extend into the water to provide lateral stability
2.  on an even keel well-balanced; steady
3.  any structure corresponding to or resembling the keel of a ship, such as the central member along the bottom of an aircraft fuselage
4.  biology a ridgelike part; carina
5.  a poetic word for ship
 
vb
6.  to capsize
 
[C14: from Old Norse kjölr; related to Middle Dutch kiel,keel²]
 
'keel-less1
 
adj

keel2 (kiːl)
 
n
1.  a flat-bottomed vessel, esp one used for carrying coal
2.  a measure of coal equal to about 21 tons
 
[C14 kele, from Middle Dutch kiel; compare Old English cēol ship]

keel3 (kiːl)
 
n
1.  red ochre stain used for marking sheep, timber, etc
 
vb
2.  to mark with this stain
 
[Old English cēlan, from cōlcool]

keel4 (kiːl)
 
vb
an archaic word for cool
 
[C15: probably from Scottish Gaelic cīl]

keel5 (kiːl)
 
n
a fatal disease of young ducks, characterized by intestinal bleeding caused by Salmonella bacteria
 
[C19: from keel1; see keel over]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

keel
"lowest timber of a ship or boat," mid-14c., from O.N. kjölr "keel," from P.Gmc. *keluz, of uncertain origin. Etymologists say this is unconnected with the root of M.Du. kiel "ship," O.E. ceol "ship's prow," O.H.G. kiel, Ger. Kiel "ship," but the two words have influenced each other. This other
word is said to be from P.Gmc. *keula, from PIE *geul- "rounded vessel." Keel still is used locally in England and U.S. for "flat-bottomed boat," especially on the Tyne. To keel over (1876) is from the nautical image of a ship turning keel-up. Keelhaul is 17c. from Du. kielhalen "to haul under the keel," an old punishment. The verb is 1838, Amer.Eng., from the noun.
Online Etymology Dictionary, © 2010 Douglas Harper
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