spermatogonia

/S P ER1 M AH0 T AA1 G OW1 N IY0 AH0/
noun
  1. 1

    Any of the undifferentiated cells in the male gonads that become spermatocytes; a spermatoblast

Source: https://en.wiktionary.org/wiki/spermatogonia, https://en.wiktionary.org/wiki/spermatogonium