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 (spər-măt′ə-sīt′, spûr′mə-tə-)
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.


1. (Zoology) zoology an immature male germ cell, developed from a spermatogonium, that gives rise, by meiosis, to four spermatids
2. (Botany) botany a male germ cell that develops into an antherozoid
Also called: nematoblast or nematocide


(spɜrˈmæt əˌsaɪt)

a male sex cell that gives rise by meiosis to a pair of haploid cells, which become the reproductive cells.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spermatocyte - a male gametocyte that develops into four spermatids
gametocyte - an immature animal or plant cell that develops into a gamete by meiosis
References in periodicals archive ?
Total counts of primary spermatocytes (preleptotene and pachytene), secondary spermatocyte, round spermatid, step-19 spermatid and spermatogonia were declined by 60.
Fed sea urchins also had larger spermatocyte columns, whereas Field sea urchins had a higher amount of spermatozoa (Fig.
Tdrd1 deficient mice were sterile due to prevention of the meiotic process in the spermatocyte (Chuma et al.
01) changes in the multinuclear structure in spermatogenic cells, predominantly in primary spermatocyte cells in the walls of some tubules and necrotic spermatogenic cells with eosinophilic cytoplasm and pyknotic nucleus were observed (Figure 3c).
Also, there were no significant differences between the number of spermatocyte I and spermatid in different groups (Figure 1, Table 3).
Spermatogenesis was also divided into five stages: spermatogonia, primary spermatocyte, secondary spermatocyte, spermatids and spermatozoa.
The germ cell nuclei (spermatocyte I in preleptotene/leptotene (SPT I Pl/L); spermatocyte I in pachytene (SPT I P); round spermatids (SPD Ar) and Sertoli cell nucleolus at stage VII (RUSSELL et al.
Two hours after injection, animals were sacrificed by cervical dislocation for preparation of the chromosomes of bonemarrow and spermatocyte cells.
Differences in diameters of spermatogenic (spermatogonium, spermatocyte, spermatid, and spermatozoa) and oogenic stages (oogonia, previtellogenic oocyte, vitellogenic oocyte, and postvitellogenic oocyte) between diploids and tetraploids were analyzed by means of analysis of variance (Statistica v.
We have documented the progression of spermatocyte development and formation of the spermatozeugmata within the testicular tissue.
The chromosomes in the pachytene stage of the prophase appear in the nucleus of the primary spermatocyte near the Sertoli cells (Fig.