embryonal area

em·bry·o·nal ar·e·a

, embryonic area
the area of the blastoderm or embryonic disc on either side of, and immediately cephalic to, the primitive streak where the component cell layers have become thickened.

em·bry·o·nal ar·e·a

, embryonic area (em'brē-ōn'ăl ār'ē-ă, em'brē-on'ik)
The area of the blastoderm on either side of, and immediately cephalic to, the primitive streak where the component cell layers have become thickened.