keel /ˈki(ə)l/
 龍骨,平底船(vt.)裝以龍骨,使傾覆(vi.)傾覆
 keel /ˈkɪl/ 名詞
 (拉carina)龍骨,龍骨狀突起,脊棱,中肋,龍骨瓣(花),幼鴨敗血性腸炎,舟瓣,翻轉,傾覆
 Keel, v. i. [imp. & p. p. Keeled p. pr. & vb. n. Keeling.]
 1. To traverse with a keel; to navigate.
 2. To turn up the keel; to show the bottom.
 To keel over, to upset; to capsize. [Colloq.]
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 Keel v. t. & i.  To cool; to skim or stir. [Obs.]
    While greasy Joan doth keel the pot.   --Shak.
 Keel, n. A brewer's cooling vat; a keelfat.
 Keel, n.
 1. Shipbuilding A longitudinal timber, or series of timbers scarfed together, extending from stem to stern along the bottom of a vessel. It is the principal timber of the vessel, and, by means of the ribs attached on each side, supports the vessel's frame. In an iron vessel, a combination of plates supplies the place of the keel of a wooden ship. See Illust. of Keelson.
 2. Fig.: The whole ship.
 3. A barge or lighter, used on the Tyne for carrying coal from Newcastle; also, a barge load of coal, twenty-one tons, four cwt. [Eng.]
 4. Bot. The two lowest petals of the corolla of a papilionaceous flower, united and inclosing the stamens and pistil; a carina. See Carina.
 5. Nat. Hist. A projecting ridge along the middle of a flat or curved surface.
 6. Aeronautics In a dirigible, a construction similar in form and use to a ship's keel; in an aëroplane, a fin or fixed surface employed to increase stability and to hold the machine to its course.
 Bilge keel Naut., a keel peculiar to ironclad vessels, extending only a portion of the length of the vessel under the bilges. --Ham. Nav. Encyc.
 False keel. See under False.
 Keel boat. (a) A covered freight boat, with a keel, but no sails, used on Western rivers. [U. S.] (b) A low, flat-bottomed freight boat. See Keel, n., 3.
 Keel piece, one of the timbers or sections of which a keel is composed.
 On even keel, in a level or horizontal position, so that the draught of water at the stern and the bow is the same. --Ham. Nav. Encyc.
 On an even keel a. & adv., steady; balanced; steadily.
 keel
      n 1: the median ridge on the breastbone of birds that fly
      2: one of the main longitudinal beams (or plates) of the hull
         of a vessel; can extend vertically into the water to
         provide lateral stability
      v : walk as if unable to control one's movements; "The drunken
          man staggered into the room" [syn: stagger, reel, lurch,
           swag, careen]