Find the word definition

The Collaborative International Dictionary
Uro-

Uro- \U"ro-\ A combining form fr. Gr. o'y^ron, urine.

Uro-

Uro- \U"ro-\ A combining form from Gr. o'yra`, the tail, the caudal extremity.

Douglas Harper's Etymology Dictionary
uro-

word-forming element meaning "urine," from comb. form of Greek ouron "urine" (see urine).

Wiktionary
uro-

Etymology 1 pre. urine; relating to urine Etymology 2

pre. urochord or the Urochordata; having a tail.