n.1 a the rotating coil or coils of a dynamo or electric motor. b any moving part of an electrical machine in which a voltage is induced by a magnetic field.
2 a piece of soft iron placed in contact with the poles of a horseshoe magnet to preserve its power. Also called KEEPER.
3 Biol. the protective covering of an animal or plant.
4 a metal framework on which a sculpture is moulded with clay or similar material.
5 archaic arms; armour.
Etymology: F f. L armatura armour (as ARM(2), -URE)