Severe congenital mental handicap.
- ‘She herself has been suffering from uremia inherited from her mother and is also registered as suffering from ‘slight amentia’ (mental deficiency) in her own disability certificate.’
- ‘There are probably other types of amentia in which a rare recessive gene is the chief determinant.’
- ‘Moreover the anxiety about gestation increased and she developed amentia at last.’
Late Middle English: from Latin, literally madness from amens, ament- mad from a- without + mens the mind.