Definition of invaginate in English:
 invaginate
verb ɪnˈvadʒɪneɪtɪnˈvædʒəˌneɪt
be invaginatedAnatomy Biology Be turned inside out or folded back on itself to form a cavity or pouch.
 Example sentencesExamples
-  In some areas, the lining cells invaginated into the underlying fibrous tissue and appeared as glandlike structures.
 -  Walls bend sharply from rounded part of hemisphere to flattened part, and then slope inward toward apparently invaginated aperture.
 -  Flat or invaginated basalia are rare in genera in either family.
 -  In the present study, transversely fractured and thin-sectioned images indicate that the pigment granule membrane is invaginated.
 -  The base of the cuticular layer had a finely invaginated appearance.
 
Origin
  
Mid 17th century: back-formation from invagination.
   Definition of invaginate in US English:
 invaginate
verbinˈvajəˌnātɪnˈvædʒəˌneɪt
be invaginatedAnatomy Biology Be turned inside out or folded back on itself to form a cavity or pouch.
 Example sentencesExamples
-  Walls bend sharply from rounded part of hemisphere to flattened part, and then slope inward toward apparently invaginated aperture.
 -  The base of the cuticular layer had a finely invaginated appearance.
 -  In the present study, transversely fractured and thin-sectioned images indicate that the pigment granule membrane is invaginated.
 -  Flat or invaginated basalia are rare in genera in either family.
 -  In some areas, the lining cells invaginated into the underlying fibrous tissue and appeared as glandlike structures.
 
Origin
  
Mid 17th century: back-formation from invagination.