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ur-1

1.
variant of uro-1 :
uranalysis.

ur-2

1.
variant of uro-2. before a vowel:
urite.

ur-3

(sometimes initial capital letter)
1.
a combining form meaning “earliest, original,” used in words denoting the primal stage of a historical or cultural entity or phenomenon:
ur-civilization; urtext.
Origin
< German ur-, Middle High German, Old High German; cognate with Old English or-
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ur-

ur-

combining form
1.
a variant of uro-1 , uro-2

Ur-

combining form
1.
original, primitive: Ursprache
Word Origin
German

uro-1

combining form
1.
indicating urine or the urinary tract: urochrome, urogenital, urolith, urology
Word Origin
from Greek ouron urine

uro-2

combining form
1.
indicating a tail: urochord, uropod, urostyle
Word Origin
from Greek oura
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 ur-

prefix meaning "original, earliest, primitive," from German; at first only in words borrowed from German (cf. ursprache "hypothetical primitive language"); since mid-20c. a living prefix in English. Cf. also Urschleim under protoplasm and Urquell under Pilsner.

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

ur- pref.
Variant of uro-1.

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