invaginate

from WordNet (r) 3.0 (2006)

invaginate
    v 1: sheathe; "The chrysalis is invaginated"
    2: fold inwards; "some organs can invaginate" [syn:
       {invaginate}, {introvert}]

from The Collaborative International Dictionary of English v.0.48

Invaginate \In*vag"i*nate\, v. t.
   To insert as in a sheath; to produce intussusception in.
   Invaginate

from The Collaborative International Dictionary of English v.0.48

Invaginate \In*vag"i*nate\, Invaginated \In*vag"i*na`ted\, a.
   (Biol.)
   (a) Sheathed.
   (b) Having one portion of a hollow organ drawn back within
       another portion.
       [1913 Webster]

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