spermatocyte
Concise Oxford English Dictionary © 2008 Oxford University Press:
spermatocyte /ˈspəːmətə(ʊ)sʌɪt, spəˈmat-/
▶noun Biology a cell produced at the second stage in the formation of spermatozoa, formed from a spermatogonium and dividing by meiosis into spermatids.
'spermatocyte' also found in these Oxford entries:

