cathode

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English[edit]

Alternative forms[edit]

Etymology[edit]

From Ancient Greek κατα- (kata-, down) and ὁδός (hodós, threshold), forming the New Greek compound κάθοδος (káthodos).

Pronunciation[edit]

Noun[edit]

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cathode (plural cathodes)

  1. (electricity) An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows outwards (and thus, electrons flow inwards). It usually, but not always, has a positive voltage.
  2. (chemistry, by extension) The electrode at which chemical reduction of cations takes place, usually resulting in the deposition of metal onto the electrode.
  3. (electronics) The electrode from which electrons are emitted into a vacuum tube or gas-filled tube.
  4. (electronics) That electrode of a semiconductor device which is connected to the n-type material of a p-n junction.

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Translations[edit]

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.

French[edit]

Noun[edit]

cathode f (plural cathodes)

  1. cathode

Further reading[edit]