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A rotating electric machine with two armatures, used to convert alternating current to direct current.
[Greek dunamis, power; see dynamic + motor.]
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.
(Electrical Engineering) an electrical machine having a single magnetic field and two independent armature windings of which one acts as a motor and the other a generator: used to convert direct current from a battery into alternating current
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
dy•na•mo•tor(ˈdaɪ nəˌmoʊ tər)
an electric machine for transforming direct current into alternating current or for altering the voltage of direct current.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.