Primitive groove

Primitive groove

Infobox Embryology
Name = Primitive groove
Latin =
GraySubject = 6
GrayPage = 47


Caption = Surface view of embryo of Hylobates concolor. The amnion has been opened to expose the embryonic disk.


Caption2 =
System =
CarnegieStage = 9
Precursor =
GivesRiseTo =
MeshName =
MeshNumber =
DorlandsPre = g_12
DorlandsSuf = 12402766
A shallow groove, the primitive groove, appears on the surface of the primitive streak, and the anterior end of this groove communicates by means of an aperture, the blastophore, with the yolk-sac.

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Look at other dictionaries:

  • Primitive groove — 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 groove — n a depression or groove in the epiblast of the primitive streak that extends forward to the primitive knot * * * a lengthwise median furrow in the primitive streak of the embryo; in human embryos it is clearly visible during the third week.… …   Medical dictionary

  • primitive groove — noun : a depression or groove in the epiblast of the primitive streak that extends forward to the primitive knot …   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

  • Primitive axes of coordinate — 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 chord — 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 circle — 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 colors — 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 Fathers — 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 plane — 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

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