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uro-

1
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a combining form meaning “urine,” used in the formation of compound words: urology.
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Also especially before a vowel, ur-.

Origin of uro-

1
<Greek, combining form of oûron urine

Other definitions for uro- (2 of 2)

uro-2

a combining form meaning “tail,” used in the formation of compound words: uropod.
Also especially before a vowel, ur-.

Origin of uro-

2
<New Latin ūro-, combining form representing Greek ourá
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

WORDS THAT USE URO-

What does uro- mean?

Uro- is a combining form used like a prefix that has two unrelated senses.

The first is “urine.” It is often used in medical terms, especially in pathology. In some terms, such as urostomy, uro- is used to denote the urinary tract, the system for removing urine from the body. This ur- comes from Greek oûron, meaning “urine.” Other combining forms that mean “urine,” such as urino- and urin-, come from the Latin for “urine,” ūrīn(a).

The second is “tail.” It is occasionally used in scientific terms, especially in anatomy and zoology. This ur- ultimately comes from Greek ourá, meaning “tail.” The name of the uroboros, a mythological symbol of the snake eating its own tail, comes from this same Greek word.

What are variants of uro-?

When combined with words or word elements that begin with a vowel, both uro- combining forms become ur-; ur- with the sense “urine” forms uremia, while ur- with the sense “tail” forms urite. Want to know more? Read our Words That Use ur- article.

Examples of uro- meaning “urine”

An example of a medical term you may have come across that features the combining form uro- is urology, “the scientific, clinical, and especially surgical aspects of the study of the urine and the genitourinary tract in health and disease.”

The first portion of the word, uro-, here means “urine.” The -logy portion of the word may also look familiar; it is used to name sciences or bodies of knowledge. Urology therefore means “the science of urine.”

What are some words that use the combining form uro-?

What are some other forms that uro- may be commonly confused with?

Break it down!

The combining form -pathy has a variety of meanings, including “disease.” With this in mind, what kind of medical condition is uropathy?

Examples of uro- meaning “tail”

One example of a term from zoology that features the form uro- to mean “tail” is uromere, meaning “any segment of the abdomen of an arthropod.” Arthropods constitute a phylum of animals including insects and spiders.

The combining form uro- in terms from zoology means “tail,” while the -mere portion of the word means “part,” from Greek méros. Uromere literally translates to “tail part.”

What are some words that use the combining form uro-?

What are some other forms that uro- may be commonly confused with?

Break it down!

Lobsters have an appendage known as a uropod that they use to help move around. Given that -pod means “having a foot,” what does uropod mean?

How to use uro- in a sentence

  • We had a tremendous reception at Bafilo, the Uro and all his people turning out to do us honour.

  • In a similar way the petals and labellum of Odontoglossum Uro-Skinneri have been found reduced to filamentous processes.

    Vegetable Teratology|Maxwell T. Masters

British Dictionary definitions for uro- (1 of 2)

uro-1

before a vowel ur-


combining form
indicating urine or the urinary tracturochrome; urogenital; urolith; urology

Word Origin for uro-

from Greek ouron urine

British Dictionary definitions for uro- (2 of 2)

uro-2

before a vowel ur-


combining form
indicating a tailurochord; uropod; urostyle

Word Origin for uro-

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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