INVAGINATION

invagination, introversion, intussusception, infolding

(noun) the folding in of an outer layer so as to form a pocket in the surface; “the invagination of the blastula”

invagination, introversion

(noun) the condition of being folded inward or sheathed

Source: WordNet® 3.1

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Etymology

Noun

invagination (countable and uncountable, plural invaginations)

(medicine) The process where an anatomical part invaginates upon itself or into another structure.

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

Source: Wiktionary

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In*vag`i*na"tion, n. Etym: [L. pref. in- + vagina sheath.]

1. (Biol.)

Definition: The condition of an invaginated organ or part.

2. (Biol.)

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

Note: In embolic invagination, one half of the blastosphere is pushed in towards the other half, producing an embryonic form known as a gastrula.

– In epibolic invagination, a phenomenon in the development of some invertebrate ova, the epiblast appears to grow over or around the hypoblast.

Source: Webster’s Unabridged Dictionary 1913 Edition

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