spermatid

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spermatid

[sper´mah-tid]

a cell produced by meiotic division of a secondary spermatocyte; it develops into the spermatozoon.

sper·ma·tid

(sper'mă-tid),

A cell in a late stage of the development of the spermatozoon; it is a haploid cell derived from the secondary spermatocyte and differentiates by spermiogenesis into a spermatozoon.

Synonym(s): nematoblast

[spermat- + -id (2)]

spermatid

(spûr′mə-tĭd)

Any of the four haploid cells that are formed by meiosis from a spermatocyte and that develop into spermatozoa without further division.

sper·ma·tid

(spĕr'mă-tid)

A cell in a late stage of the development of the sperm; it is a haploid cell derived from the secondary spermatocyte and evolves by spermiogenesis into a sperm.

[spermat- + -id (2)]

spermatid

a haploid stage in male GAMETO GENESIS.

References in periodicals archive ?

In the mature planula two major kinds of derivatives differentiate from interstitial cells: a single type of bipolar ganglion cell and four types of nematoblasts. Of the latter only three types (desmonemes, stenoteles, and microbasic heterotrichous b-mastigophores with inclusions) complete differentiation in the planula; only a few nematocytes with bullet-shaped capsules (microbasic heterotrichous b-mastigophores with inclusions) were ever found in the planula.

In the planula the interstitial cells, nematoblasts, and neuroblasts emigrate from the endoderm to the ectoderm.

Stages of larval development and stem cell population changes during metamorphosis of a hydrozoan planula

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