[ an-ohd ]

  1. the electrode or terminal by which current enters an electrolytic cell, voltaic cell, battery, etc.

  2. the negative terminal of a voltaic cell or battery.

  1. the positive terminal, electrode, or element of an electron tube or electrolytic cell.

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Origin of anode

1825–35; <Greek ánodos way up, equivalent to an-an-3 + hodós way, road

Words Nearby anode Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use anode in a sentence

  • On the anode side, purple permanganate ions are seen rising toward the positive electrode.

  • The plate where the current goes in, the anode, A (Fig. 247), loses in weight since some of the silver is dissolved.

    Physics | Willis Eugene Tower
  • It is best to use a fine silver anode, so that the solution, does not get contaminated by copper.

    On Laboratory Arts | Richard Threlfall
  • If the area of the cathode exceeds that of the anode the solution is said to grow weaker, and vice versa.

    On Laboratory Arts | Richard Threlfall
  • As the masses grow towards the anode the defect naturally tends to increase of itself, hence the necessity for care.

    On Laboratory Arts | Richard Threlfall

British Dictionary definitions for anode


/ (ˈænəʊd) /

  1. the positive electrode in an electrolytic cell

  2. Also called (esp US): plate the positively charged electrode in an electronic valve

  1. the negative terminal of a primary cell: Compare cathode

Origin of anode

C19: from Greek anodos a way up, from hodos a way; alluding to the movement of the current to or from the positive pole

Derived forms of anode

  • anodal (eɪˈnəʊdəl) or anodic (əˈnɒdɪk), adjective

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

Scientific definitions for anode


[ ănōd′ ]

  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.

  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.