prostate gland n.
A chestnut-shaped body that surrounds the beginning of the male urethra at the base of the bladder, consists of two lobes connected anteriorly by an isthmus and posteriorly by a middle lobe lying above and between the ejaculatory ducts, controls the release of urine from the bladder, and whose milky fluid secretion is discharged into the urethra during semen emission.
A gland in the male reproductive system that surrounds the urethra at the lower end of the urinary bladder. A large part of the fluids that make up semen comes from the prostate.
Note: Prostate cancer is a leading cause of death among American men.