armor

(ärˈmər)

1. A defensive covering, as of metal, wood, or leather, worn to protect the body against weapons.
2. A tough, protective covering, such as the bony scales covering certain animals or the metallic plates on tanks or warships.
3. A safeguard or protection: faith, the missionary's armor.
4. a. The combat arm that deploys armored vehicles, such as tanks.
   b. The armored vehicles of an army.