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The movement of electrons from one electron carrier to another in a series of oxidation-reduction reactions. Electron transport is used in the light reactions of photosynthesis and in the final stage of cellular respiration to produce ATP from ADP, phosphate, and the energy that is released as an electron is moved from one carrier to another with a lower level of energy.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biochemistry) biochem the metabolic process in mitochondria or chloroplasts, in which electrons are transferred in stages from energy-rich compounds to molecular oxygen with liberation of energy
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the stepwise transfer of electrons from one carrier molecule, as a flavoprotein or a cytochrome, to another and ultimately to oxygen during the aerobic production of ATP.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.