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Noun: mental retardation
  1. Lack of normal development of intellectual capacities
    - retardation, backwardness, slowness, subnormality

Derived forms: mental retardations

Type of: daftness [informal], stupidity

Encyclopedia: Mental retardation, autosomal recessive 61

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mental lexicon
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mental telepathist
mental test
mental testing
mental unsoundness
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mentalist