Definition of evert in English:


Pronunciation /əˈvərt/

transitive verb

[with object]Biology Physiology
  • Turn (a structure or organ) outward or inside out.

    as adjective everted ‘the characteristic facial appearance of full, often everted lips’
    • ‘They feed by grasping the prey, then everting their stomach and secreting primary enzymes on the prey.’
    • ‘These nozzles could not be confused with ‘eversible gland openings,’ as described by Forsyth, or the obviously everted female spermatheca.’
    • ‘Most Asteroidea are predators or scavengers, everting their stomach (called a cardiac stomach), which secretes digestive enzymes on their prey.’
    • ‘The cyst wall is then everted and approximated to the edge of the vestibular mucosa with interrupted 2-0 absorbable suture.’
    • ‘To facilitate patellar cartilage removal, the first assistant clamps the medial edges of the tendons above and below the patella and everts the tissue.’
    turn inside out


Mid 16th century (in the sense ‘upset, overthrow’): from Latin evertere, from e- (variant of ex-) ‘out’ + vertere ‘to turn’. The current sense dates from the late 18th century.