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]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