Yours, Etc.: Origins and Uses of 8 Sign-Offs
early 14c., from Old French urine (12c.), from Latin urina "urine," from PIE *ur- (cf. Greek ouron "urine"), variant of root *awer- "to moisten, flow" (cf. Sanskrit var "water," Avestan var "rain," Lithuanian jures "sea," Old English wær, Old Norse ver "sea," Old Norse ur "drizzling rain").
urine u·rine (yur'ĭn)
The waste product secreted by the kidneys that in mammals is a fluid that is yellow to amber in color, slightly acidic, and discharged from the body through the urethra.