| Spermatogonium (n.) A primitive seminal cell, occurring in masses in the seminal tubules. It divides into a mass (spermosphere) of small cells (spermoblast), which in turn give rise to spermatozoids. Thesaurus Entries androcyte, antheridium, antherozoid, male gamete, milt, protein, scum, seed, semen, seminal fluid, sperm, sperm cell, spermagonium, spermatic fluid, spermatid, spermatiophore, spermatium, spermatocyte, spermatogonium, spermatophore, spermatozoa, spermatozoid, spermatozoon |