S: (n) MANPAD (a man-portable surface-to-air missile)
S: (n) Stinger (a portable low altitude surface-to-air missile system using infrared guidance and an impact fuse; fired from the shoulder)
S: (n) heat-seeking missile (a missile with a guidance system that directs it toward targets emitting infrared radiation (as the emissions of a jet engine))
S: (n) brilliant pebble (a code name for a small computerized heat-seeking missile that was supposed to intercept and destroy enemy missiles)