Sabot (noun)

1. A wooden shoe worn by French peasants, typically made of a single block of wood.
2. A metal shoe or lining used to protect a gun barrel from wear and tear during firing, typically in artillery or naval guns.

Origin:

From the french word "sabot" meaning "a wooden shoe" or "clog", it first appeared in the 17th century.

Examples:

1. The French peasants would wear sabot to protect their feet while working in the fields.
2. The sabot round was designed to provide improved performance against armored targets.
3. The sabot separates from the projectile after leaving the muzzle.
4. The sabot is made of a lightweight material to reduce recoil.
5. The sabot is used to reduce the diameter of the projectile to fit the bore of the gun.