electrode

n. electrical conductor, part of an electrical circuit; pole of an electric battery

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words elektron (meaning amber, from which the word electricity is derived) and hodos, a way.
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Electrode /elec·trode/ a conductor or medium by which an electric current is conducted to or from any medium, such as a cell, body, solution, or [more]Electrode - Community and Resources

Noun
1. a conductor used to make electrical contact with some part of a circuit
(hypernym) conductor
(hyponym) anode
(part-holonym) battery, electric battery

n. electrode, electrical conductor, part of an electrical circuit