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

• (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1707, literally "a taking in," from Latin intus "within" (see ento- ) + susceptionem "a taking up" (see susceptible ).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Intussusception \In`tus*sus*cep"tion\, n. [L. intus within + susception. Cf. Introsusception .] The reception of one part within another. (Med.) The abnormal reception or slipping of a part of a tube, by inversion and descent, within a contiguous part of ...

Wikipedia Word definitions in Wikipedia
An intussusception is a medical condition in which a part of the intestine invaginates (folds into) into another section of intestine, similar to the way the parts of a collapsible telescope retract into one another. This can often result in an obstruction. ...

WordNet Word definitions in WordNet
n. the folding in of an outer layer so as to form a pocket in the surface; "the invagination of the blastula" [syn: invagination , introversion , infolding ] (biology) growth in the surface area of a cell by the deposit of new particles between existing ...

Wiktionary Word definitions in Wiktionary
n. 1 (context rare English) Absorption. 2 (context medicine English) The invagination of one portion of a tubular anatomical structure (especially intestines or blood vessels) within the next.