Cathode Definition

kăthōd
cathodes
noun
cathodes
In an electron tube, the negatively charged electron emitter.
Webster's New World
In an electroplating cell, the negatively charged electrode, from which current flows.
Webster's New World
In a battery that is a source of electric current, as a dry cell or storage battery, the positive electrode which receives the electrons from the external circuit.
Webster's New World
The source of electrons in an electrical device, such as a vacuum tube or diode.
American Heritage Science
Antonyms:
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Other Word Forms of Cathode

Noun

Singular:
cathode
Plural:
cathodes

Origin of Cathode

  • Greek kathodos descent kat-, kata- cata- hodos way, path

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek κάθοδος (kathodos, “descent, way down”).

    From Wiktionary

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