Artificial intelligent assistant

infolding

ˈinˌfolding, vbl. n.
  [in adv. 11 c.]
  A folding in, a turning in with a fold.

1873 Mivart Elem. Anat. ix. 372 Infoldings of the surface of the organ. 1897 Allbutt's Syst. Med. II. 1122 Microscopically they consist of hypertrophic ingrowths rather than infoldings of the cuticle. 1898 P. Manson Trop. Diseases xxxii. 499 The cylindrical appearance of the worm is produced by the lateral infolding of the two sides of what would otherwise be a flat body.

Oxford English Dictionary

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