sper·mat·o·cyte 
(spər-mătə-sīt′, spûrmə-tə-)
(spər-mătə-sīt′, spûrmə-tə-)n.
A diploid cell that undergoes meiosis to form four spermatids. A primary spermatocyte divides into two secondary spermatocytes, which in turn divide to form the spermatids.