WordReference Random House Unabridged Dictionary of American English © 2017
in•vag•i•na•tion  (in vaj′ə nāshən),USA pronunciation n. 
  1. the act or process of invaginating.
  2. Developmental Biology[Embryol.]the inward movement of a portion of the wall of a blastula in the formation of a gastrula.
  3. Pathologyintussusception (def. 3).
  4. Anatomya form or shape resulting from an infolded tissue.
  • invaginate + -ion 1650–60

'invagination' also found in these entries:

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