What is the X in X-mas?
1880, from Modern Latin gonas (plural gonades), coined from Greek gone, gonos "seed, act of generation, race, family," from gignesthai "be born," related to genos "race, birth, descent" (see genus). Related: gonads.
gonad go·nad (gō'nād')
An organ that produces gametes, especially a testis or an ovary.
in zoology, primary reproductive gland that produces reproductive cells (gametes). In males the gonads are called testes; the gonads in females are called ovaries. (see ovary; testis).