noun. The act or process of invaginating or the condition of being invaginated.

noun. An invaginated organ or part.

noun. The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.

noun. The act of introverting or sheathing, or the state of being sheathed; insertion or reception as into a sheath; intussusception.

noun. The condition of an invaginated organ or part.

noun. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed.

noun. The inward movement of one part of the wall of a blastula, to form a gastrula; the process of gastrulation, in which layers of the ovum are differentiated.

noun. The process where an anatomical part invaginates upon itself or into another structure.

noun. One of the methods by which the various germinal layers of the ovum are differentiated.

noun. the folding in of an outer layer so as to form a pocket in the surface

noun. the condition of being folded inward or sheathed