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uro-¹ or ur-

pref.

1. Urine: uric.

2. Urinary tract: urology.

3. Urea: urethane.

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

uro-² or ur-

pref.

Tail: uropod.

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

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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