s-suh-sep-shuh
n]
| 1. | a taking within. |
| 2. | Biology. growth of a cell wall by the deposition of new particles among the existing particles of the wall. Compare apposition (def. 4). |
| 3. | Also called invagination. Pathology. the slipping of one part within another, as of the intestine. |

intussusception in·tus·sus·cep·tion (ĭn'tə-sə-sěp'shən)
n.
Invagination, especially an infolding of one part of the intestine into another.
Assimilation of new substances into the existing components of living tissue. Also called introsusception.
intussusception
telescoping of a segment of the intestine into an adjacent segment, producing a mechanical obstruction of the alimentary canal. Primary intussusception is sometimes congenital and rarely appears later than the third year of life; it arises in the course of intestinal development, but the mechanism producing it is unknown.
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