to cool; to skim or stir.-a brewer's cooling vat; a keelfat.-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.-fig.: the whole ship.-a barge or lighter, used on the type for carrying coal from newcastle; also, a barge load of coal, twenty-one tons, four cwt.-the two lowest petals of the corolla of a papilionaceous flower, united and inclosing the stamens and pistil; a carina. see carina.-a projecting ridge along the middle of a flat or curved surface.-to traverse with a keel; to navigate.-to turn up the keel; to show the bottom.