• synonyms


  1. variant of uro-1: uranalysis.
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  1. variant of uro-2 before a vowel: urite.
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(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.
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Origin of ur-3

< German ur-, Middle High German, Old High German; cognate with Old English or-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for ur-


combining form
  1. a variant of uro- 1, uro- 2
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combining form
  1. original, primitiveUrsprache
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Word Origin

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

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.

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Online Etymology Dictionary, © 2010 Douglas Harper

ur- in Medicine


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