Testicles

n. testis, male reproductive organ located within the scrotum

The testicle (from Latin testis, meaning "witness", plural testes) or ballock is the male generative gland in animals. This article will concentrate on mammalian testicles unless otherwise noted.
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Testicles Also called testes or gonads, they are part of the male reproductive system, and are located beneath the penis in the scrotum. [more]Testicles - Community and Resources

Noun
1. one of the two male reproductive glands that produce spermatozoa and secrete androgens; "she kicked him in the balls and got away"
(synonym) testis, orchis, ball, ballock, bollock, nut, egg
(hypernym) male reproductive gland
(hyponym) cobblers
(part-holonym) male reproductive system
(part-meronym) testicular artery, internal spermatic artery, arteria testicularis

The male sex glands. The testicles produce and store sperm and are the major source of testosterone.