"presence of pus in the urine," 1787, from medical Latin (by 1760s), from pyo- + -uria (see urine).
Entries linking to pyuria
pyo-
word-forming element used from mid-19c. and meaning "pus," from Greek puon "pus" (see pus).
urine n.
c. 1300, from Old French orine, urine (12c.) and directly from Latin urina "urine," from PIE *ur- (source also of Greek ouron "urine"), variant of root *we-r- "water, liquid, milk" (source also of Sanskrit var "water," Avestan var "rain," Lithuanian jūrės "sea," Old English wær, Old Norse ver "sea," Old Norse ur "drizzling rain"), related to *eue-dh-r (see udder).