electrode

[ih-lek-trohd]
noun Electricity.
a conductor, not necessarily metallic, through which a current enters or leaves a nonmetallic medium, as an electrolytic cell, arc generator, vacuum tube, or gaseous discharge tube.

Origin:
1825–35; electr- + -ode2

interelectrode, noun
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World English Dictionary
electrode (ɪˈlɛktrəʊd)
 
n
1.  a conductor through which an electric current enters or leaves an electrolyte, an electric arc, or an electronic valve or tube
2.  an element in a semiconducting device that emits, collects, or controls the movement of electrons or holes

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Etymonline
Word Origin & History

electrode
1834, coined by Eng. physicist and chemist Michael Faraday (1791-1867) from electro- (see electric) + Gk. hodos "way" (see cede).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

electrode e·lec·trode (ĭ-lěk'trōd')
n.

  1. A solid electric conductor through which an electric current enters or leaves an electrolytic cell or other medium.

  2. A collector or emitter of electric charge or of electric-charge carriers, as in a semiconducting device.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
electrode   (ĭ-lěk'trōd')  Pronunciation Key 
A conductor through which an electric current enters or leaves a substance (or a vacuum) whose electrical characteristics are being measured, used, or manipulated. Electrodes can be used to detect electrical activity such as brain waves. Terminal points in electrical components such as transistors, diodes, and batteries are electrodes.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Electrodes taped to the skin transmit signals to tiny motors that power the
  fingers.
Graphite rods inside the tube function as negative electrodes and host bacteria
  that stick to the rods' surfaces.
They used electrodes to shock silicon wafers with enough electricity to create
  a silicon vapor.
One is a standard battery, in which the whole material of the electrodes acts
  as a storage medium.
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