uro-

uro- ¹

or ur-

pref.

1. Urine: uric.

2. Urinary tract: urology.

3. Urea: urethane.

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[New Latin ūro-, from Greek ouro-, from ouron, urine.]

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uro- ²

or ur-

pref.

Tail: uropod.

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[New Latin ūro-, from Greek ouro-, from ourā; see ors- in Indo-European roots.]

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.

uro-

or before a vowel

ur-

combining form

indicating urine or the urinary tract: urochrome; urogenital; urolith; urology.

[from Greek ouron urine]

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uro-

or before a vowel

ur-

combining form

indicating a tail: urochord; uropod; urostyle.

[from Greek oura]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

uro-¹

,

a combining form meaning “urine”: urology.

Also, esp. before a vowel,ur-.

[< Greek, comb. form of oûron urine]

uro-²

,

a combining form meaning “tail”: uropod.

[< New Latin ūro-, comb. form representing Greek ourá]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.