| spermatophyta | <botany> A major division of the plant kingdom, characterised by reprodution by seed and subdivided into the Gymnospermae (gymnosperms) and Angiospermae (angiosperms). (09 Oct 1997) |
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| Spermatophyte | <botany> Division of the plant kingdom, consisting of plants that reproduce by means of seeds. (18 Nov 1997) |
| spermatopoietic | Synonym: spermatogenic. 2. Secreting semen. Origin: spermato-+ G. Poieo, to make (05 Mar 2000) |
| spermatorrhoea | <medicine> Abnormally frequent involuntary emission of the semen without copulation. Origin: NL, fr. Gr, seed + to flow. Source: Websters Dictionary (01 Mar 1998) |
| spermatoxin | A cytotoxic antibody specific for spermatozoa. Synonym: spermotoxin. (05 Mar 2000) |
| spermatozoa | Mature male germ cells, the specific output of the testes. The spermatozoon is the generative element of the semen and serves to fertilise the ovum. It consists of a head (or nucleus), a neck, a middle piece, and a tail with an end piece. Spermatzoa, formed in the seminiferous tubules, are derived from spermatogonia, which first develop into spermatocytes, which, in turn, undergo meiosis to produce spermatids; the spermatids then differentiate into spermatozoa. (12 Dec 1998) |
| spermatozoal | Spermatozoan Relating to spermatozoa. (05 Mar 2000) |
| spermatozoid | <biology> The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoon. In plants the more usual term is antherozoid. Origin: Spermatozoon + Gr. Form. Source: Websters Dictionary (01 Mar 1998) |
| spermatozooid | <biology> A spermatozoid. Source: Websters Dictionary (01 Mar 1998) |
| spermatozoon | Mature sperm cell (male gamete). (18 Nov 1997) |
| spermatocyte |
Sperm mother cell. The cell that undergoes two meiotic divisions (spermatogenesis) to form four spermatids; the primary spermatocyte before completion of the first meiotic division; the secondary spermatocyte after completion of the first meiotic division.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| spermatogenesis |
The series of cell divisions in the testis by which maturation of the gametes (sperm) of the male takes place.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| spermatogonium |
(pl: spermatogonia) Primordial male germ cell that may divide by mitosis to produce more spermatogonia. A spermatogonium may enter a growth phase and give rise to a primary spermatocyte.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| spermatozoon |
(pl: spermatozoa; abbr: sperm) The mature, mobile reproductive cell of male animals, produced by the testis.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| spermatocele |
a harmless cyst containing fluid and sperm that occurs in the tube through which sperm travel from the testicles
출처: www.american-depot.com/services/resources_gl_s.asp
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