Definition of evert in English:

evert

verb

[WITH OBJECT]Physiology Biology
  • Turn (a structure or organ) outwards or inside out:

    ‘the brown hyena deposits chemicals by everting an anal pouch’
    ‘the characteristic facial appearance of full, often everted lips’
    • ‘These nozzles could not be confused with ‘eversible gland openings,’ as described by Forsyth, or the obviously everted female spermatheca.’
    • ‘They feed by grasping the prey, then everting their stomach and secreting primary enzymes on the prey.’
    • ‘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
    View synonyms

Origin

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.

Pronunciation:

evert

/ɪˈvəːt/