/in'teuhs seuh sep"sheuhn/ , n.
1. a taking within.
2. Biol. growth of a cell wall by the deposition of new particles among the existing particles of the wall. Cf. apposition (def. 4).
3. Also called invagination . Pathol. the slipping of one part within another, as of the intestine.
[ 1700-10; intus within + susception- (s. of susceptio ) an undertaking, equiv. to suscept ( us ), ptp. of suscipere (see SUSCEPTIBLE) + -ion- -ION ]