The Collaborative International Dictionary
Spermatoa
Spermatoon \Sper`ma*to"["o]n\, n.; pl. Spermatoa. [NL., fr.
Gr. spe`rma, -atos, seed + ??? an egg.] (Anat.)
A spermoblast. -- Sper`ma*to"al, a.
--Owen.
Wiktionary
spermatoa
n. (plural of spermatoon English)