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|Noun||1.||guidance device - a system of equipment for automatically guiding the path of a vehicle (especially a missile)|
guided missile - a rocket-propelled missile whose path can be controlled during flight either by radio signals or by internal homing devices
JDAM, Joint Direct Attack Munition - a pinpoint bomb guidance device that can be strapped to a gravity bomb thus converting dumb bombs into smart bombs
system - instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"