- in an electroplating cell, the positively charged electrode, toward which current flows
- in an electron tube, the principal electrode for collecting electrons, operated at a positive potential with respect to the cathode
- in a battery that is a source of electric current, as a dry cell or storage battery, the negative electrode from which the electrons are released to the external circuit
Origin of anodecoined by Michael Faraday ; from Classical Greek anodos, a way up ; from ana-, up + hodos, way: see -ode
- A positively charged electrode, as of an electrolytic cell, storage battery, or electron tube.
- The negatively charged terminal of a primary cell or of a storage battery that is supplying current.
Origin of anodeGreek anodos, a way up : ana-, ana- + hodos, way.
- a·nod′ic , a·nod′al
- a·nod′i·cal·ly, a·nod′al·ly
- (electricity) An electrode, of a cell or other electrically polarized device, through which a current of electricity flows outwards (thus, electrons flow inwards). It usually, but not always, has a positive voltage.
- (chemistry, by extension) The electrode at which chemical oxidation of anions takes place, usually resulting in the erosion of metal from the electrode.
- (electronics) The electrode which collects electrons emitted by the cathode in a vacuum tube or gas-filled tube.
- (electronics) That electrode of a semiconductor device which is connected to the p-type material of a p-n junction.
From Ancient Greek ἄνοδος (anodos, “way up”).