ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈsepshən noun
( -s )
Etymology: probably from New Latin intussusception-, intussusceptio, probably from (assumed) New Latin intussusceptus + Latin -ion-, -io -ion
1. : the reception of one part within another : invagination ; especially : the passing of one portion of the intestine into an adjacent portion producing intestinal obstruction
2. : the deposition of new particles of formative material among those already embodied in a tissue or structure (as in the growth of living organisms) — usually distinguished from accretion and apposition