keel

keel
keel1
—keeled, adj.
/keel/, n.
1. Naut. 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. (cap.) Astron. the constellation Carina.
5. Bot., Zool. a longitudinal ridge, as on a leaf or bone; a carina.
6. Also called brace molding. Archit. a projecting molding the profile of which consists of two ogees symmetrically disposed about an arris or fillet.
7. on an even keel, in a state of balance; steady; steadily: The affairs of state are seldom on an even keel for long.
v.t., v.i.
8. to turn or upset so as to bring the wrong side or part uppermost.
9. keel over,
a. to capsize or overturn.
b. to fall as in a faint: Several cadets keeled over from the heat during the parade.
[1325-75; 1895-1900 for def. 9; ME kele < ON kjolr; c. OE ceol keel, ship; see KEEL2]
keel2
/keel/, n. Brit. Dial.
1. keelboat.
2. a keelboat load of coal; the amount of coal carried by one keelboat.
3. a measure of coal equivalent to 21 long tons and 4 hundredweight (21.5 metric tons).
[1375-1425; late ME kele < MD kiel ship; c. OE ceol ship, G kiel ship (obs.), KEEL1]
keel3
/keel/, v.t. Brit. Dial.
to cool, esp. by stirring.
[bef. 900; ME kelen, OE celan to be cool; akin to COOL]
keel4
/keel/, n.
a red ocher stain used for marking sheep, lumber, etc.; ruddle.
[1475-85; earlier keyle (north and Scots dial.); cf. ScotGael cìl (itself perh. < E)]

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▪ ship part
      in shipbuilding, the main structural member and backbone of a ship or boat, running longitudinally along the centre of the bottom of the hull from stem to stern. It may be made of timber, metal, or other strong, stiff material. Traditionally it constituted the principal member to which the ribs were attached on each side and to which the stem and sternpost were also attached. Another type of main keel—properly, the “full keel,” or “ballast keel”—is a vertical downward extension of the boat's hull, narrowly V-shaped; it is usually ballasted or weighted for stability and lateral resistance.

 The backbone keel may be supplemented by other keels (see Figure—>). A “centreboard”—also called a drop keel, or sliding keel—is a retractable keel midships that may be lowered to increase lateral resistance and prevent sideslip. A “skeg” is an aftward extension of the keel intended to keep the boat moving straight and to protect the propeller and rudder from underwater obstructions. A “fin keel” is a narrow plate (of wood, metal, or other material) fixed midships to the keel of a shallow boat (such as a racing yacht) and projecting downward to provide lateral resistance. It is intended both to steady the boat and to make it handy to steer. A “bilge keel” is one of a pair of longitudinal plates that, like fins, project from the sides of a ship or boat and run parallel to the centre keel. They are intended to check rolling. On large ships the outward projections of the bilge keels may be slight; on small yachts they may be comparatively deep.
 

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Universalium. 2010.

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Look at other dictionaries:

  • Keel — Keel, n. [Cf. AS. ce[ o]l ship; akin to D. & G. kiel keel, OHG. chiol ship, Icel. kj[=o]ll, and perh. to Gr. gay^los a round built Ph[oe]nician merchant vessel, gaylo s bucket; cf. Skr. g[=o]la ball, round water vessel. But the meaning of the… …   The Collaborative International Dictionary of English

  • keel — keel·age; keel·boat·man; keel·haul; keel·less; keel; keel·man; keel·son; va·keel; keel·er; keel·hale; …   English syllables

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  • keel — [kiːl] noun on an even keel working smoothly without any sudden changes: • a strategy to put the economyon an even keel * * * keel UK US /kiːl/ noun [C] ● on an even keel Cf. on an even keel …   Financial and business terms

  • Keel — Keel, v. i. [imp. & p. p. {Keeled}; p. pr. & vb. n. {Keeling}.] 1. To traverse with a keel; to navigate. [1913 Webster] 2. To turn up the keel; to show the bottom. [1913 Webster] {To keel over}, to upset; to capsize. [Colloq.] [1913 Webster] …   The Collaborative International Dictionary of English

  • keel — keel1 [kēl] n. [ME kele < ON kjǫlr < Gmc * kelu < IE base * gel , to swallow > L gula, throat] 1. the chief timber or steel piece extending along the entire length of the bottom of a boat or ship and supporting the frame: it sometimes …   English World dictionary

  • Keel — (k[=e]l), v. t. & i. [AS. c[=e]lan to cool, fr. c[=o]l cool. See {Cool}.] To cool; to skim or stir. [Obs.] [1913 Webster] While greasy Joan doth keel the pot. Shak. [1913 Webster] …   The Collaborative International Dictionary of English

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  • keel|er — keel|er1 «KEE luhr», noun. Dialect. 1. a vessel for cooling liquids. 2. a shallow tub for various purposes. 3. a shallow box used in dressing mackerel. ╂[< keel5 + er1] keel|er2 «KEE luhr», noun. British. a sailboat having a keel rather than a …   Useful english dictionary

  • Keel — Keel, n. A brewer s cooling vat; a keelfat. [1913 Webster] …   The Collaborative International Dictionary of English

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