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uni-(word root) one, single
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
Single; one: unicycle.
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.
consisting of, relating to, or having only one: unilateral; unisexual.
[from Latin ūnus one]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form occurring in loanwords from Latin (universe), used with the meaning “one” (unicycle).
[< Latin ūni-, comb. form of ūnus one; see -i-]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.