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Having or mounted on a common axis.
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.
1. (Mathematics) having or being mounted on a common axis
2. (Mathematics) geometry (of a set of circles) having all the centres on a straight line
3. (Electronics) electronics formed from, using, or connected to a coaxial cable
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
co•ax•i•al(koʊˈæk si əl)
having a common axis or coincident axes.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.