Last Updated：2025/11/28
(psychology, dated) A developmental disability in which the person has a very low intelligence quotient, usually below 70, plus difficulty in multiple areas of daily life. Evidence of this disability must have appeared before the person reached adulthood for diagnosis.
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mental retardation
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Source Word
mental retardation
Noun
dated
uncountable
Japanese Meaning
知的障害：発達障害の一種で、知能指数が通常70以下であり、日常生活の複数の領域において適応行動に困難を示す状態。診断は成人に達する前にその特徴が認められることが条件となる。
