Definition of evert in English:



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

    ‘the characteristic facial appearance of full, often everted lips’
    • ‘Most Asteroidea are predators or scavengers, everting their stomach (called a cardiac stomach), which secretes digestive enzymes on their prey.’
    • ‘These nozzles could not be confused with ‘eversible gland openings,’ as described by Forsyth, or the obviously everted female spermatheca.’
    • ‘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.’
    • ‘They feed by grasping the prey, then everting their stomach and secreting primary enzymes on the prey.’
    turn inside out
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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.