n 1  :  INVAGINATION : esp  :  the slipping of a length of intestine into an adjacent portion usu. producing 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) - compare ACCRETION APPOSITION1   in*tus*sus*cep*tive adj 
 
 
 
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