1. Vacuum tube: dynatron.
2. Device for manipulating subatomic particles: betatron.
[Greek, instrumental n. suff.]
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.
suffix forming nouns
1. (Electronics) indicating a vacuum tube: magnetron.
2. (Atomic Physics) indicating an instrument for accelerating atomic or subatomic particles: synchrotron.
[from Greek, suffix indicating instrument]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form extracted from electron, used in the names of electron tubes (magnetron) and of devices for accelerating subatomic particles (cyclotron).
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.