| Noun | 1. | armature - coil in which voltage is induced by motion through a magnetic fieldcoil - reactor consisting of a spiral of insulated wire that introduces inductance into a circuit electric motor - a motor that converts electricity to mechanical work electromagnet - a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet rotor, rotor coil - the rotating armature of a motor or generator |