spermatogonium

‖n. [ NL., fr. Gr. &unr_;&unr_;&unr_;&unr_;, &unr_;&unr_;&unr_;, sperm + &unr_;&unr_;&unr_; offspring. ] (Physiol.) A primitive seminal cell, occuring in masses in the seminal tubules. It divides into a mass (spermosphere) of small cells (spermoblast), which in turn give rise to spermatozoids. [ 1913 Webster ]