spermium

sper·mi·um

, pl.

sper·mi·a

(sper'mē-ŭm, -ă),
H.W.G. Waldeyer term for the mature male germ cell or sperm.

sper·mi·um

, pl. spermia (spĕr'mē-ŭm, -ă)
The mature male germ cell or sperm.