S: (n) device (an instrumentality invented for a particular purpose) "the device is small enough to wear on your wrist"; "a device intended to conserve water"
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) missile (a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote control)
S: (n) device (an instrumentality invented for a particular purpose) "the device is small enough to wear on your wrist"; "a device intended to conserve water"
S: (n) motion, movement, move, motility (a change of position that does not entail a change of location) "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; "gastrointestinal motility"
S: (n) change (the action of changing something) "the change of government had no impact on the economy"; "his change on abortion cost him the election"
S: (n) action (something done (usually as opposed to something said)) "there were stories of murders and other unnatural actions"