anode
Meaning
- An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows inwards (and thus, electrons flow outwards). It can have either a positive or a negative voltage with respect to cathode of the same polarized device (depending on whether the device is a load or a source, respectively).
- (by extension) The electrode at which chemical oxidation of anions takes place, usually resulting in the erosion of metal from the electrode.
- The electrode which collects electrons emitted by the cathode in a vacuum tube or gas-filled tube.
- That electrode of a semiconductor device which is connected to the p-type material of a p-n junction.
Synonyms
Pronounced as (IPA)
/ˈæn.əʊd/
Etymology
From Ancient Greek ἀνα- (ana-, “up”) and ὁδός (hodós, “path”), forming the New Greek compound ἄνοδος (ánodos). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year.
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