Uberon definition : A small, circular, white spot (approximately 2-3 mm across) on the surface of the
yellow yolk of an egg that has been laid. The nucleus of the egg is in the germinal
disc.;
Uberon synonym : germinal disc;
Uberon related term : embryonic disc; gastrodisk; germ disc;
A small, circular, white spot (approximately 2-3 mm across) on the surface of the
yellow yolk of an egg that has been laid. The nucleus of the egg is in the germinal
disc.