the electrode or terminal by which current leaves an electrolytic cell, voltaic cell, battery, etc.
the positive terminal of a voltaic cell or battery.
the negative terminal, electrode, or element of an electron tube or electrolytic cell.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use cathode in a sentence
Every zinc-air battery cell contains two electrodes — a zinc anode and a porous cathode — separated by a liquid called an electrolyte.Zinc-air batteries are typically single-use. A new design could change that | Maria Temming | January 5, 2021 | Science News
Nearly all of that lithium then returns to the cathode during the discharge cycle.This super-energy-dense battery could nearly double the range of electric vehicles | James Temple | December 8, 2020 | MIT Technology Review
Xiaomi has also jettisoned the reflective cathode layer that would normally make the screen opaque, even when there’s no image.
The carmaker’s decision to make its own battery cells, and to enter production of battery cathodes and associated raw materials, is intended to add in-house capacity alongside deals with external suppliers as demand for electric vehicles rises.
The cathode can be one of several lithium-containing materials.
His discovery was in effect that electric rays emanated from the part of the tube struck by the cathode rays.Invention | Bradley A. Fiske
The plate where the current goes out, the cathode, C, increases in weight since some of the silver is deposited.Physics | Willis Eugene Tower
The diagram, of the tube shows that the main tube has been expanded round the edges of the cathode.
This is to reduce the heating consequent on the projection of cathode rays from the edges of the disc against the glass tube.
When the annealing is finished the side tube is bent as shown to serve as a handle when the time comes to mount the cathode.
British Dictionary definitions for cathode
the negative electrode in an electrolytic cell; the electrode by which electrons enter a device from an external circuit
the negatively charged electron source in an electronic valve
the positive terminal of a primary cell
- Compare anode
- cathodal (kæˈθəʊdəl), cathodic (kæˈθɒdɪk, -ˈθəʊ-) or cathodical, 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 cathode
The negative electrode in an electrolytic cell, toward which positively charged particles are attracted. The cathode has a negative charge because it is connected to the negatively charged end of an external power supply.
The source of electrons in an electrical device, such as a vacuum tube or diode.
The positive electrode of a voltaic cell, such as a battery. The cathode gets its positive charge from the chemical reaction that happens inside the battery, not from an external source. Compare anode.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.