Urinary

adj. pertaining to urine

The urinary system is the organ system that produces, stores, and eliminates urine. In humans it includes two kidneys, two ureters, the bladder, and the urethra. The analogous organ in invertebrates is the nephridium.
See more at Wikipedia.org...

Urinary /uri·nary/ pertaining to, containing, or secreting urine. u·ri·nar·y adj. 1. Relating to urine and its production, function, or excretion. 2. [more]Urinary - Community and Resources

Adjective
1. of or relating to the function or production or secretion of urine
(pertainym) urine, piss, pee, piddle, weewee, water
2. of or relating to the urinary system of the body
(pertainym) urogenital system, urogenital apparatus, urinary system, urinary apparatus, genitourinary system, genitourinary apparatus, systema urogenitale, apparatus urogenitalis

(n.)
A urinarium; also, a urinal.
  

(a.)
Resembling, or being of the nature of, urine.
  

(a.)
Of or pertaining to the urine; as, the urinary bladder; urinary excretions.