ure·thra /jʊˈriθrə/
  尿道
  ure·thra /jʊˈrɪθrə/ 名詞
  尿道
  U·re·thra n.  Anat. The canal by which the urine is conducted from the bladder and discharged.
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  urethra
       n : duct through which urine is discharged in most mammals and
           which serves as the male genital duct
       [also: urethrae (pl)]