n. A blockhead; a dunce; a dolt; a thickskull.n. A spherical mass of iron with a long handle, used after being heated for various purposes, as to liquefy tar, to ignite the priming of a cannon, etc. Also called loggerheat.n. A post in the stern of a whale-boat, with a bell-shaped head, around which the harpoon-line passes; a snubbing-post.n. The hawk-billed turtle, a marine species of the genus Thalassochelys, as the American loggerhead, T. caouana or caretta, or the Indian, T. olivacea; also, the alligator-turtle of the southern United States, Macrochelys lacertina.n. The small gray or Carolinian shrike, Lanius ludovicianus, a bird of the family Laniidæ, resident and abundant in the southern parts of the United States, and sometimes as far north as New England.n. A flycatcher.n. The chub.n. A kind of sponge found in Florida.n. plural The knapweed, Centaurea nigra; also, the blue-bottle, C. Cyanus.n. In the southern United States, the common snapping-turtle, Chelydra serpentina.n. Specifically— in the British West Indies, a name applied to two large tyrant flycatchers, Pitangus caudifas-ciatus, and Myiarchus crinitus.n. The steamer-duck, Tachyeres cinereus, a flightless water-fowl of the Falkland Islands and Straits of Magellan.n. A lever or walking-beam which connects the piston-rod of an engine to the pump-plunger.n. A pewter inkstand, circular and very heavy.n. A large, heavy head, out of proportion to the body.