- U -

umbilical cord

The tube that connects the fetus to the placenta.

 

undescended testicle

A condition in which a testis has not dropped down through the iniguinal canal from the abdomen into the scrotum.

 

urethra

The tube through which urine passes out of the body; in males, it is also the tube through which semen is discharged.

 

urethral opening

The opening in the urethra through which urine is expelled.

 

urethritis

Inflammation of the urethra.

 

urophilia (or urolagnia)

A sexual variation in which the person derives sexual excitement from urine or urination. Such activities are often referred to as "water sports."

 

uterine cycle

Another term for menstrual cycle.

 

uterus

A hollow, thick-walled, muscular organ in the pelvic cavity of a woman; it is the site at which a fertilized egg implants and the fetus develops during pregnancy.