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) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
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"