- A firm partly muscular partly glandular body that is situated about the base of the mammalian male urethra and secretes an alkaline viscid fluid which is a major constituent of the ejaculatory fluid.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
- A gland in the male reproductive system just below the bladder. The prostate surrounds part of the urethra, the canal that empties the bladder, and produces a fluid that forms part of semen.
National Cancer Institute
See also Understanding Medical Terminology.