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Definition of Mental defectiveness
1. Noun. Retardation sufficient to fall outside the normal range of intelligence.
Exact synonyms: Abnormality
Generic synonyms: Backwardness, Mental Retardation, Retardation, Slowness, Subnormality
Specialized synonyms: Feeblemindedness
Derivative terms: Abnormal
Generic synonyms: Backwardness, Mental Retardation, Retardation, Slowness, Subnormality
Specialized synonyms: Feeblemindedness
Derivative terms: Abnormal