| v. t. & i. | 1. | To cool; to skim or stir. |
| n. | 1. | A brewer's cooling vat; a keelfat. |
| 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. |
| 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. |
| v. i. | 1. | To traverse with a keel; to navigate. |
| 2. | To turn up the keel; to show the bottom. |