noun
1.
a. : a pale firm partly muscular partly glandular body that surrounds the base of the male urethra in man and other mammals and discharges its viscid opalescent secretion through ducts opening into the floor of the urethra
b. : a corresponding group of glands about the female urethra of some mammals commonly considered a rudimentary or vestigial homologue of the male gland
2. : any of various glandular bodies associated with genital ducts of male invertebrates and like or likened to the mammalian prostate