Definition of "Invagination" :
noun: the folding in of an outer layer so as to form a pocket in the surface
"The invagination of the blastula."
noun: the condition of being folded inward or sheathed
noun: the folding in of an outer layer so as to form a pocket in the surface
"The invagination of the blastula."
noun: the condition of being folded inward or sheathed