Definition of evaginate in English:

evaginate

Pronunciation /əˈvajəˌnāt/ /əˈvædʒəˌneɪt/

verb

Biology Physiology
  • (with reference to a tubular or pouch-shaped organ or structure) turn or be turned inside out.

    • ‘the sacs evaginate and come to lie externally’
    turn inside out

Origin

Mid 17th century from Latin evaginat- ‘unsheathed’, from the verb evaginare, from e- (variant of ex-) ‘out of’ + vagina ‘sheath’.