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) whole, unit (an assemblage of parts that is regarded as a single entity) "how big is that part compared to the whole?"; "the team is a unit"
S: (n) congener (a whole (a thing or person) of the same kind or category as another) "lard was also used, though its congener, butter, was more frequently employed"; "the American shopkeeper differs from his European congener"