mental deficiency

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Related to mental deficiencies: Mentally challenged

mental deficiency

[′men·təl di′fish·ən·sē]
(psychology)
A condition characterized by intellectual retardation, social inadequacy, and persistent dependency.
References in periodicals archive ?
Mental deficiencies were accounted for in social rather than biological or medical terms.
She was smart, educated and had no signs of mental deficiencies.
THE Mental Deficiencies Act 1913 allowed the detention of patients known to be sane but labelled "morally defective".