The prostate gland is part of a man's reproductive system; it's located near his bladder and is about the size of a kiwi fruit. Prostate cancer, which is fairly common in men, is usually treatable if it is detected early.
The prostate is a gland found in most male mammals. The root word is the Greek prostates, which literally means one who stands before, or protector, guardian — which describes the prostate's position in front of the bladder. Don't confuse prostate, the part of male anatomy, with prostrate a verb that describes lying down.