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"canal through which urine is discharged from the bladder," 1630s, from Late Latin urethra, from Greek ourethra "the passage for urine," coined by Hippocrates from ourein "to urinate," from ouron (see urine).
urethra u·re·thra (yu-rē'thrə)
n. pl. u·re·thras or u·re·thrae (-thrē)
The canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male. Also called urogenital canal.
Plural urethras or urethrae (y-rē'thrē)
The duct through which urine passes from the bladder to the outside of the body in most mammals and some fish and birds. In males, the urethra passes through the penis and also serves as the duct for the release of sperm, which enter the urethra from the vas deferens.
duct that transmits urine from the bladder to the exterior of the body during urination. The urethra is held closed by the urethral sphincter, a muscular structure that helps keep urine in the bladder until voiding can occur.