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[an-ohd] /ˈæn oʊd/
the electrode or terminal by which current enters an electrolytic cell, voltaic cell, battery, etc.
the negative terminal of a voltaic cell or battery.
the positive terminal, electrode, or element of an electron tube or electrolytic cell.
Origin of anode
1825-35; < Greek ánodos way up, equivalent to an- an-3 + hodós way, road Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for anode
Historical Examples
  • To the anode he attached one of the negatives, to the cathode a small piece of iron.

    Spawn of the Comet Harold Thompson Rich
  • He lifted the anode from the solution now, removed the negative, and held it up.

    Spawn of the Comet Harold Thompson Rich
  • The anode is inserted into its bulb in a quite similar manner.

    On Laboratory Arts Richard Threlfall
  • In the method of construction shown in Fig. 41, the anode is put in first.

    On Laboratory Arts Richard Threlfall
  • I do not think that the formation of a crust upon the anode can be entirely prevented.

    On Laboratory Arts Richard Threlfall
  • A rod of carbon dipping into the melted salt serves as the anode.

  • He applied the current, moving the anode and the cathode slowly.

    The Silent Bullet Arthur B. Reeve
  • The current always flows within the cell from anode to the cathode.

    Physics Willis Eugene Tower
  • Second, the plate which forms the anode of the circuit from battery, B2.

    Physics Willis Eugene Tower
  • These corpuscles bombard the anode and keep it incandescent.

British Dictionary definitions for anode


the positive electrode in an electrolytic cell
Also called (esp US) plate. the positively charged electrode in an electronic valve
the negative terminal of a primary cell Compare cathode
Derived Forms
anodal (eɪˈnəʊdəl), anodic (əˈnɒdɪk) adjective
Word Origin
C19: from Greek anodos a way up, from hodos a way; alluding to the movement of the current to or from the positive pole
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for anode

1834, coined from Greek anodos "way up," from ana "up" (see ana-) + hodos "way" (see cede). Proposed by the Rev. William Whewell (1794-1866), English polymath, and published by English chemist and physicist Michael Faraday (1791-1867). So called from the path the electrical current was thought to take. Related: Anodic.

Online Etymology Dictionary, © 2010 Douglas Harper
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anode in Science
  1. The positive electrode in an electrolytic cell, toward which negatively charged particles are attracted. The anode has a positive charge because it is connected to the positively charged end of an external power supply.

  2. The positively charged element of an electrical device, such as a vacuum tube or a diode, to which electrons are attracted.

  3. The negative electrode of a voltaic cell, such as a battery. The anode gets its negative charge from the chemical reaction that happens inside the battery, not from an external source. Compare cathode.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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