Definition of Male gonad

Male gonad: A testis, one of a pair of organs located behind the penis in a pouch of skin called the scrotum. The testes produce and store sperm and are also the body's main source of male hormones. These hormones control the development of the reproductive organs and other male characteristics, such as body and facial hair, low voice, and wide shoulders.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=8976
Last Editorial Review: 3/19/2012