| germinal | Pertaining or belonging to a germ; as, the germinal vesicle. <biology> Germinal layers, the nucleus of the ovum of animals. See: Germ. Source: Websters Dictionary (01 Mar 1998) |
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| germinal aplasia | A disorder in which the seminiferous tubules exhibit an abnormal cytoarchitecture and extensive hyalinization; the testes are small, and few spermatozoa are formed; the body habitus may be eunuchoid, and gynaecomastia may be present; urinary gonadotropin output is usually high, and the incidence of mental deficiency and illness increased; sex chromatin may be male or female, and androgen secretion ranges from subnormal to normal. It is a constant feature of (and is often used synonymously with) Klinefelter's syndrome. Synonym: germinal aplasia. (05 Mar 2000) |
| germinal area | Area germinativa, the place in the blastoderm where the embryo begins to be formed. Synonym: germinal disk. (05 Mar 2000) |
| germinal cell | A cell from which other cell's proliferate. (05 Mar 2000) |
| germinal centre | Areas within lymph nodes where B lymphocytes rapidly divide. (09 Oct 1997) |
| germinal centre kinase | <enzyme> A human ste20 homolog; mw 97 kD; has been sequenced Registry number: EC 2.7.10.- Synonym: germinal centre kinase gck, gc kinase, bl44 gene product (26 Jun 1999) |
| germinal centre of Flemming | The lightly staining centre in a lymphatic nodule in which the predominant cells are large lymphocytes and macrophages. Synonym: reaction centre. (05 Mar 2000) |
| germinal cords | The gonadal cord's of the embryonic ovary or testis. Synonym: sex cords. (05 Mar 2000) |
| germinal disk | Germ disk, the point in a telolecithal ovum where the embryo begins to be formed. Synonym: embryonic disk, germinal area, area germinativa. (05 Mar 2000) |
| germinal epithelium | A cuboidal layer of peritoneal epithelium covering the gonads, once thought to be the source of germ cells. (05 Mar 2000) |
| germinal infection | Infection of a baby with a disease by way of a parent's gamete (sperm or ovum). (09 Oct 1997) |
| germinal localization | Determination in very young embryos of the presumptive areas for specific organs or structures. Synonym: fate map. (05 Mar 2000) |
| germinal membrane | In many eggs with a large amount of yolk, cell division (cleavage) is restricted to a superficial layer of the fertilized egg (meroblastic cleavage). This layer is termed the blastoderm. In birds it is a flat disc of cells at one pole of the egg and in insects an outer layer of cells surrounding the yolk mass. (18 Nov 1997) |
| germinal mosaicism | Gonadal mosaicism, a state in which cells in a sector of a gonad are of a form not present in either parent, because of mutation in an intermediate progenitor of that sector. (05 Mar 2000) |
| germinal mutation | A mutation in the germ cells (the cells which will undergo meiosis to form the gametes). Such mutations are therefore passed on to offspring. (09 Oct 1997) |