mental retardation

mental retardation

noun
Usually Offensive. a developmental disorder characterized in varying degrees by a subnormal ability to learn, a substantially low IQ, and impaired social adjustment.

Origin:
1900–15


See retarded.
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Collins
World English Dictionary
mental retardation
 
n
psychiatry the condition of having a low intelligence quotient (below 70)

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

mental retardation n.
Subnormal intellectual development or functioning that is the result of congenital causes, brain injury, or disease and is characterized by any of various deficiencies, ranging from impaired learning ability to social and vocational inadequacy. Also called mental deficiency.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
mental retardation  
Below-average intellectual ability resulting from a genetic defect, brain injury, or disease, and usually present from birth or early infancy.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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