Definition, Meaning & Synonyms

germinal-disk

noun

/ˈdɪsk/

Definition

The germinal disk is a small, white disc found in the yolk of an egg that contains the developing embryo in avian and reptilian eggs.

Examples

The germinal disk is crucial for the formation of the future chick.
Understanding the function of the germinal disk can help in studies of embryology.
In avian biology, the germinal disk is where life begins in the egg.

Meaning

It serves as the location where the embryo will begin to develop once fertilization occurs. It is critical for the growth and development of the chick in eggs laid by birds and the embryos in reptilian eggs.