Noun
The condition of an invaginated organ or part.
One of the methods by which the various germinal layers of the ovum are differentiated.
Source: Webster's dictionarythe invagination of the blastula Source: Internet
In Sepia, which has an internal shell, the ectoderm forms an invagination whose pore is sealed off before this organic framework is deposited. Source: Internet
The invagination is pinched off, leaving the engulfed material in the membrane-enclosed vacuole and the cell membrane intact. Source: Internet
The cells of the epiblast move toward the primitive streak and slip beneath it in a process called invagination. Source: Internet