| testis (těs'tĭs) Pronunciation Key
Plural testes (těs'tēz) The primary reproductive organ of male animals, in which sperm and the male sex hormones (androgens) are produced. In most vertebrates, the testes are contained inside the body. In many mammals, however, the testes are enclosed in an external scrotum. |
sing. testis (tes-tis)
The two organs in the male reproductive system that produce sperm and testosterone. The testes are housed in the scrotum.