a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities of, usually, perpendicular electric and magnetic fields.
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Also called electric wave.
Origin of electromagnetic wave
First recorded in 1905–10
Words nearby electromagnetic wave
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for electromagnetic wave
a wave of energy propagated in an electromagnetic fieldSee also electromagnetic radiation
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 electromagnetic wave
A wave of energy consisting of electric and magnetic fields, oscillating at right angles to each other. See more at electromagnetic radiation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.