- a male germ cell (primary spermatocyte ) that gives rise by meiosis to a pair of haploid cells (secondary spermatocytes ) that give rise in turn to spermatids.
- an immature male germ cell, developed from a spermatogonium, that gives rise, by meiosis, to four spermatids
- a male germ cell that develops into an antherozoid
