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conductor con·duc·tor (kən-dŭk'tər)
A substance or medium that conducts heat, light, sound, or especially an electric charge.
An instrument or probe having a groove along which a knife is passed in slitting open a sinus or fistula; a grooved director.
A material or an object that conducts heat, electricity, light, or sound. Electrical conductors contain electric charges (usually electrons) that are relatively free to move through the material; a voltage applied across the conductor therefore creates an electric current. Insulators (electrical nonconductors) contain no charges that move when subject to a voltage. Compare insulator. See also resistance, superconductivity.