sper·ma·ti·um 
(spər-māshē-əm, -shəm)
(spər-māshē-əm, -shəm)n. pl. sper·ma·ti·a (-shē-ə, -shə)
A nonmotile male gamete, as in red algae and certain fungi.
[New Latin, from Greek spermation, diminutive of sperma, spermat-, semen; see SPERM1.]
sper·matial (-shəl) adj.