- Electricity.
- The rotating part of a dynamo, consisting essentially of copper wire wound around an iron core.
- The moving part of an electromagnetic device such as a relay, buzzer, or loudspeaker.
- A piece of soft iron connecting the poles of a magnet.
- Biology. A protective covering, structure, or organ of an animal or a plant, such as teeth, claws, thorns, or the shell of a turtle.
- A framework serving as a supporting core for the material that is used to make a sculpture.
[Middle English, armor, from Old French, from Latin armātūra, equipment, from armātus, past participle of armāre, to arm. See arm2.]





