horseshoe

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A flat U-shaped metal plate fitted and nailed to the bottom of a horse's hoof for protection.
• noun A U-shaped object similar to a horseshoe.
• noun A game in which players toss horseshoes or horseshoe-shaped metal pieces at a stake so as to encircle it or come closer to it than the other players.
• transitive verb To fit with horseshoes.

from The Century Dictionary.

• noun Nautical, a composition strap bent in the form of a horseshoe and used for fastening the stem to the keel.
• noun A shoe for a horse, consisting commonly of a narrow plate of iron bent into a form somewhat resembling the letter U, so as to accommodate itself to the shape of the horse's foot.
• noun Anything shaped like a horseshoe.
• noun In zoology: A horseshoe-crab.
• noun A bivalve mollusk, Lutraria elliptica. Also called clump.
• noun plural The game of quoits, in which horseshoes are often used for pitching.
• To provide with horseshoes, or shape like a horseshoe.
• In architecture, to carry inward at the imposts, as an arch, so as to bring it approximately to the form of a horseshoe.

from the GNU version of the Collaborative International Dictionary of English.

• noun A shoe for horses, consisting of a narrow plate of iron in form somewhat like the letter U, nailed to a horse's hoof.
• noun Anything shaped like a horsehoe, such as a U-shaped bend in a river.
• noun (Zoöl.) The Limulus or horsehoe crab.
• noun A game in which horseshoes or horseshoe-shaped objects (usually made of metal) are thrown at either of two stakes fixed in the ground at a distance of 30 to 40 feet apart. The player stands at or near one stake and throws several the horseshoes at the other stake. Points are scored when the player throws the horseshoe so that it surrounds the stake; fewer points are scored if the horseshoe is close to but not surrounding the stake. The players take turns and the first player to achieve the target score wins.
• noun (Med.) an old name for the condition of the skull in children, in which the sutures are too open, the coronal suture presenting the form of a horsehoe.
• noun an artificial magnet in the form of a horsehoe.
• noun See Horsenail.
• noun (Zoöl.) a bat of the genus Rhinolophus, having a nasal fold of skin shaped like a horsehoe.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The U-shaped metallic shoe of a horse.
• noun A U-shaped piece of metal used to play the game horseshoes.
• noun The U shape of a horseshoe.
• noun bodybuilding, slang A well-developed set of triceps brachii muscles.
• noun logic The symbol ⊃.
• verb To apply horseshoes to a horse.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun U-shaped plate nailed to underside of horse's hoof
• verb equip (a horse) with a horseshoe or horseshoes
• noun game equipment consisting of an open ring of iron used in playing horseshoes