urethra

from WordNet (r) 3.0 (2006)

urethra
    n 1: duct through which urine is discharged in most mammals and
         which serves as the male genital duct

from The Collaborative International Dictionary of English v.0.48

Urethra \U*re"thra\, n. [L., fr. Gr. ?. See {Urine}.] (Anat.)
   The canal by which the urine is conducted from the bladder
   and discharged.
   [1913 Webster]