invaginate
verb
in·vag·i·nate in-ˈva-jə-ˌnāt 
invaginated; invaginating
transitive verb
1
: enclose, sheathe
2
: to fold in so that an outer becomes an inner surface
intransitive verb
: to undergo invagination
Word History
Etymology
Medieval Latin invaginatus, past participle of invaginare, from Latin in- + vagina sheath
First Known Use
circa 1656, in the meaning defined at transitive sense 1
Medical Definition
invaginate
verb
in·vag·i·nate in-ˈvaj-ə-ˌnāt
invaginated; invaginating
transitive verb
1
: to cover or enclose (as within the body)
2
: to fold in so that an outer becomes an inner surface
invaginate the sac into the lumen
E. A. Graham
E. A. Grahamintransitive verb
: to undergo invagination
a condition in which a portion of the intestine invaginates into the adjacent segment New England Journal of Medicine
New England Journal of Medicine