Mil. interceptor

• Patriot, e.g.: Abbr.
• A defensive missile designed to shoot down incoming intercontinental ballistic missiles
• A U.S. missile
• SALT treaty subject
• "Star Wars" weapon (abbr.)
• Modern def. weapon
• Weapon for U.S. forces
• A 1972 bilateral arms-control treaty, for short
• Def. projectile

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1963, initialism (acronym) for anti-ballistic missile.