Know how to use "fewer" and "less"? Find out.
"to turn (a tube) inside out," 1650s, from Latin evaginatus, past participle of evaginare "to unsheathe," from ex- (see ex-) + vagina (see vagina). Related: Evaginated; evaginating.
evagination e·vag·i·na·tion (ĭ-vāj'ə-nā'shən)n. The protrusion of some part or organ from its normal position.