- primitive streak
- the region of the embryo that proliferates rapidly, producing mesoderm cells that spread outwards between the layers of ectoderm and endoderm.
The new mediacal dictionary. 2014.
primitive streak
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Primitive streak — Primitive Prim i*tive, a. [L. primitivus, fr. primus the first: cf. F. primitif. See {Prime}, a.] 1. Of or pertaining to the beginning or origin, or to early times; original; primordial; primeval; first; as, primitive innocence; the primitive… … The Collaborative International Dictionary of English
primitive streak — primitive streak. См. первичная полоска [у эмбриона]. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
primitive streak — n an elongated band of cells that forms along the axis of an embryo early in gastrulation by the movement of lateral cells toward the axis and that develops a groove along its midline through which cells move to the interior of the embryo to form … Medical dictionary
Primitive streak — Infobox Embryology Name = Primitive streak Latin = GraySubject = 6 GrayPage = 47 Caption = Surface view of embryo of a rabbit. arg. Embryonic disk. pr. Primitive streak. Caption2 = Width = 215 System = CarnegieStage = 6b Days = 15 Precursor =… … Wikipedia
primitive streak — Thickened streak of cells in early mammalian and avian embryos marks location of embryonic axis. Hensen&’s node is at the end of the primitive streak until the cellular movements of gastrulation cause it to regress caudally … Dictionary of molecular biology
primitive streak — noun Date: 1854 an elongated band of cells that forms along the axis of a developing fertilized egg early in gastrulation and that is considered a forerunner of the neural tube and nervous system … New Collegiate Dictionary
primitive streak — see germ band … Dictionary of invertebrate zoology
primitive streak — noun Biology the earliest trace of the embryo in a fertilized ovum … English new terms dictionary
primitive streak — noun : an opaque band that appears in the blastoderm in the axial line of the future embryo but somewhat behind the place where the embryo proper begins to develop and that represents a highly modified blastopore through which the involution of… … Useful english dictionary
Primitive — Prim i*tive, a. [L. primitivus, fr. primus the first: cf. F. primitif. See {Prime}, a.] 1. Of or pertaining to the beginning or origin, or to early times; original; primordial; primeval; first; as, primitive innocence; the primitive church. Our… … The Collaborative International Dictionary of English
