evaginate

UK: /ɪˈvædʒɪˌneɪt/ US: (i vaj′ə nāt′)

WordReference Random House Unabridged Dictionary of American English © 2026

e•vag•i•nate  (i vaj′ə nāt′), v.t., -nat•ed, -nat•ing. 

1. Anatomy to turn inside out, or cause to protrude by eversion, as a tubular organ.

• Late Latin ēvāgīnātus (past participle of ēvāgīnāre) unsheathed, equivalent. to ē- e- + vāgīn(a) scabbard, sheath (see vagina) + -ātus -ate¹
• 1650–60;

e•vag•i•na•ble  (i vaj′ə nə bəl), adj.  e•vag′i•na′tion, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

evaginate / ɪˈvædʒɪˌneɪt/ verb

1. (transitive) to turn (an organ or part) inside out; turn the outer surface of (an organ or part) back on itself

Etymology: 17th Century: from Late Latin ēvāgīnāre to unsheathe, from vāgīna sheath

eˌvagiˈnation noun