mental retardation

noun

Definition of mental retardation

  1. :  subaverage intellectual ability equivalent to or less than an IQ of 70 that is accompanied by significant deficits in abilities (as in communication or self-care) necessary for independent daily functioning, is usually present from birth or infancy, and is manifested especially by delayed or abnormal development, by learning difficulties, and by problems in social adjustment :  intellectual disability

mentally retarded

adjective

1914

First Known Use of mental retardation

1914


Medical Dictionary

mental retardation

noun

Medical Definition of mental retardation

  1. :  subaverage intellectual ability equivalent to or less than an IQ of 70 that is accompanied by significant deficits in abilities (as in communication or self-care) necessary for independent daily living, is usually present from birth or infancy, and is manifested especially by delayed or abnormal development, by learning difficulties, and by problems in social adjustment :  intellectual disability Caused by the presence of an extra chromosome, Down's often results in such abnormalities as weak muscle tone, short stature and a flattened nose, as well as mental retardation.—Fred Bernstein, People Weekly, 25 Apr. 1988 fragile X syndrome, the most common inherited cause of mental retardation, which draws its name from a chromosomal deformity in its sufferers.—John Rennie, Scientific American, March 1993

mentally retarded

adjective Now age 25, she lives in a group home for mentally retarded adults.—Sandra Blakeslee, The New York Times, 2 Aug. 1994 Patients are short and thin, mentally retarded and can have many other problems …—Sue Goetinck, The Dallas Morning News, 28 Aug. 1995

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