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Definition of: toroid
(tôr′oid, tō′roid) noun
1. Geom. a A surface generated by the rotation of any closed plane curve, as a circle or ellipse, about an axis lying in its plane. b The solid produced by such a surface.
2. Electr. An electromagnetic coil wound upon a ring of circular cross–section. [<TOR(US) + -OID]
—to·roi′dal adjective
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