evaginate
/ɪˈvadʒɪneɪt
/verb Biology & Physiology
(With reference to a tubular or pouch-shaped organ or structure) turn or be turned inside out: [no object]: the sacs evaginate and come to lie externally
Derivatives
evagination
- The adenohypophysis, or anterior pituitary, is derived from an evagination of oral ectoderm of the dorsal median region of the stomodeum.
- The normal pancreas is derived from several evaginations originating from the wall of the primitive duodenum.
- On the other hand, rectal prolapse is a full-thickness evagination of the rectal wall outside the anal opening.
Origin
Mid 17th century: from Latin evaginat- 'unsheathed', from the verb evaginare, from e- (variant of ex-) 'out of' + vagina 'sheath'.