- invagination, introversion - the condition of being folded inward or sheathed
--1 is a kind of condition
Derived form: verb invaginate1 - invagination, introversion, intussusception, infolding - the folding in of an outer layer so as to form a pocket in the surface; "the invagination of the blastula"
--2 is a kind of organic process, biological process
Derived form: verb invaginate2