Definition of urethra in US English:



Anatomy Zoology
  • The duct by which urine is conveyed out of the body from the bladder, and which in male vertebrates also conveys semen.

    • ‘This chapter focuses on infections of the male urethra, epididymis, testis, and prostate.’
    • ‘If this happens, a tube is put into your urethra to empty your bladder.’
    • ‘The muscles beneath the bladder that surround the urethra are called the pelvic floor muscles.’
    • ‘Your urinary system is composed of your kidneys, ureters, bladder and urethra.’
    • ‘If a stone is lodged in the ureter, a flexible narrow instrument called a cystoscope can be passed up through the urethra and bladder.’
    • ‘Your prostate is a small doughnut-shaped gland with the urethra, which carries urine from the bladder, running through the middle of it.’
    • ‘This is when a thin tube is inserted into the urethra up to the bladder to get a ‘clean’ urine sample.’
    • ‘This is a long, thin telescope instrument with a light and lens on the end, which is passed into the bladder through the urethra.’
    • ‘Very rarely, the urethra or bladder may be damaged or perforated.’
    • ‘When you urinate, the muscles around the urethra relax and the bladder tightens to squeeze urine out.’


Mid 17th century: from late Latin, from Greek ourēthra, from ourein ‘urinate’.