| primitive reticular cell | A cell with processes making contact with those of other similar cell's to form a cellular network; along with the network of reticular fibres, the reticular cell's form the stroma of bone marrow and lymphatic tissues. (05 Mar 2000) |
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| primitive ridge | One of the paired ridge's on either side of the primitive groove. (05 Mar 2000) |
| primitive streak | An ectodermal ridge in the midline at the caudal end of the embryonic disk from which arises the intraembryonic mesoderm; achieved by inward and then lateral migration of cells; in human embryos, it appears on day 15 and gives a cephalocaudal axis to the developing embryo. Synonym: germinal streak. (05 Mar 2000) |
| primogeniture | 1. The state of being the firstborn of the same parents; seniority by birth among children of the same family. 2. The exclusive right of inheritance which belongs to the eldest son. Thus in England the right of inheriting the estate of the father belongs to the eldest son, and in the royal family the eldest son of the sovereign is entitled to the throne by primogeniture. In exceptional cases, among the female children, the crown descends by right of primogeniture to the eldest daughter only and her issue. Origin: LL, fr. L. Primus first + genitura a begetting, birth, generation, fr. Genere, gignere, to beget: cf. F. Primogeniture, L. Primogenitus firstborn. See Prime, and Genus, Kin. Source: Websters Dictionary (01 Mar 1998) |
| primordia | Plural of primordium. (05 Mar 2000) |
| primordial | 1. First in order; primary; original; of earliest origin; as, primordial condition. "The primordial facts of our intelligent nature." 2. <geology> Of or pertaining to the lowest beds of the Silurian age, corresponding to the Acadian and Potsdam periods in American geology. It is called also Cambrian, and by many geologists is separated from the Silurian. 3. <biology> Originally or earliest formed in the growth of an individual or organ; as, a primordial leaf; a primordial cell. <botany> Primordial utricle, the interior lining of a young vegetable cell. Origin: L. Primordialis, from primordium the first beginning; primus first + ordiri to begin a web, to begin: cf. F. Primordial. Source: Websters Dictionary (01 Mar 1998) |
| primordial cartilage | Cartilage in an early stage in its development. (05 Mar 2000) |
| primordial cell | A cell from a group that constitutes the primordium of an organ or part of the embryo. (05 Mar 2000) |
| primordial cyst | A cyst which develops in place of a tooth through cystic degeneration of the enamel organ prior to formation of calcified odontogenic tissue. (05 Mar 2000) |
| primordial dwarfism | Dwarfism characterised by normal development that is at a strikingly lesser rate than that for members of the same family, race, or other races. Synonym: primordial dwarfism, true dwarfism. (05 Mar 2000) |
| primordial germ cell | The most primitive undifferentiated sex cell, found initially outside the gonad. Synonym: gonocyte. (05 Mar 2000) |
| primordial gigantism | Unusually large size from birth due to familial or genetic factors or intrauterine environment (e.g., maternal prediabetic state) and not to hyperpituitarism. (05 Mar 2000) |
| primordial kidney | 1. The definitive excretory organ of primitive fishes. Synonym: head kidney. 2. In the embryos of higher vertebrates, a vestigial structure consisting of a series of tortuous tubules emptying into the cloaca by way of the primary nephric duct; in the human embryo, the pronephros is a very rudimentary and temporary structure, followed by the mesonephros and still later by the metanephros. Synonym: forekidney, primordial kidney. Origin: pro-+ G. Nephros, kidney (05 Mar 2000) |
| primordial ovarian follicle | A follicle in which the primordial oocyte is surrounded by a single layer of flattened follicular cells. (05 Mar 2000) |
| primordian | <botany> A name given to several kinds of plums; as, red primordian, amber primordian, etc. Origin: L. Primordius first of all, fr. Primordium. Source: Websters Dictionary (01 Mar 1998) |
| primary culture |
The culture of cells obtained directly from the tissue source.
출처: www.genpromag.com/Glossary~LETTER~P.html
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| primary immune response |
The response of the immune system to the first challenge by an antigen.
출처: www.genpromag.com/Glossary~LETTER~P.html
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| primer |
Oligonucleotide that may be extended by DNA polymerase.
출처: www.genpromag.com/Glossary~LETTER~P.html
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| primordium |
the earliest stage of development of an organ (Hawksworth et al., 1983).
출처: www.anbg.gov.au/glossary/webpubl/fungloss.htm
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| primary infertility |
the term used to describe a couple that has never been able to conceive a pregnancy, after a minimum of 1 year of attempting to do so
출처: members.tripod.com/allydreams-ivil/id3.html
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