sabot

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A wooden shoe worn in some European countries.
2. n. A sandal or shoe having a band of leather or other material across the instep.
3. n. A lightweight carrier in which a projectile of a smaller caliber is centered so as to permit firing the projectile within a larger-caliber weapon. The carrier fills the bore of the weapon from which the projectile is fired; it is normally discarded a short distance from the muzzle.

Century Dictionary and Cyclopedia

1. n. A wooden shoe, made of one piece hollowed out by boring-tools and scrapers, worn by the peasantry in France, Belgium, etc.
2. n. In parts of France, a sort of shoe consisting of a thick wooden sole with sides and top of coarse leather; a sort of clog worn in wet weather.
3. n. A thick circular wooden disk to which a projectile is attached so as to maintain its proper position in the bore of a gun; also, a metallic cup or disk fixed to the bottom of an elongated projectile so as to fill the bore and take the rifling when the gun is discharged.
4. n. A pointed iron shoe used to protect the end of a file.
5. n. In harp-making, one of the little disks with projecting pins by which a string is shortened when a pedal is depressed.

Wiktionary

1. n. A wooden shoe.
2. n. A carrier around projectile(s) in firearms, cannons and artillery which holds the projectile in precision within the barrel

GNU Webster's 1913

1. n. A kind of wooden shoe worn by the peasantry in France, Belgium, Sweden, and some other European countries.
2. n. (Mil.) A thick, circular disk of wood, to which the cartridge bag and projectile are attached, in fixed ammunition for cannon; also, a piece of soft metal attached to a projectile to take the groove of the rifling.

WordNet 3.0

1. n. a shoe carved from a single block of wood
2. n. footwear usually with wooden soles