germinal disk; blastodisc
Biology term for the disc-shaped region on the yolk of a large-yolked egg where the embryo develops.
scutellum
Botany term for the shield-shaped cotyledon of grass seeds, specialized for nutrient absorption from the endosperm.
In bird eggs, the germinal disk is the starting point of embryonic development.
In grass seeds, the scutellum absorbs nutrients from the endosperm.