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Related to diplex: triplexer
Capable of simultaneous transmission or reception of two messages in the same radio channel or antenna.
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.
belonging or relating to a system that permits the transmission of simultaneous signals along one wire in the same direction
See also duplex
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014