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a combining form occurring in loanwords from Latin (universe), used, with the meaning “one,” in the formation of compound words (unicycle).
Origin of uni-
< Latin ūni- combining form of ūnus one; see -i- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for uni-


combining form
consisting of, relating to, or having only one: unilateral, unisexual
Word Origin
from Latin ūnus one
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for uni-

word-forming element meaning "having one only," from Latin uni-, comb. form of unus (see one).

Online Etymology Dictionary, © 2010 Douglas Harper
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uni- in Medicine

uni- pref.
Single; one: univalent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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