- primitive axis
- noun
: an elongated thickening of the mesoblastic and hypoblastic layers of the blastoderm extending forward from the anterior end of the primitive streak
Useful english dictionary. 2012.
primitive axis
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Primitive knot — Latin nodus primitivus Gray s subject #6 47 Days 17 The primitive knot (or primitive node) is the organizer for gastrulation in vertebrates … Wikipedia
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
axis band — primitive streak … 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
Axis — The axis is the second cervical vertebra (symbol: C2). It is called the axis because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of C2. The joint between the axis and atlas is a pivot type of joint. It… … Medical dictionary
primitive rocks — Primary Pri ma*ry, a. [L. primarius, fr. primus first: cf. F. primaire. See {Prime}, a., and cf. {Premier}, {Primero}.] 1. First in order of time or development or in intention; primitive; fundamental; original. [1913 Webster] The church of… … The Collaborative International Dictionary of English
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
Primary axis — Primary Pri ma*ry, a. [L. primarius, fr. primus first: cf. F. primaire. See {Prime}, a., and cf. {Premier}, {Primero}.] 1. First in order of time or development or in intention; primitive; fundamental; original. [1913 Webster] The church of… … The Collaborative International Dictionary of English
Radical axis of two circles — Radical Rad i*cal (r[a^]d [i^]*kal), a. [F., fr. L. radicalis having roots, fr. radix, icis, a root. See {Radix}.] 1. Of or pertaining to the root; proceeding directly from the root. [1913 Webster] 2. Hence: Of or pertaining to the root or… … The Collaborative International Dictionary of English
