51Թ

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View synonyms for

mental retardation

[ men-tl ree-tahr-dey-shuhn ]

noun

mental retardation

noun

  1. psychiatry the condition of having a low intelligence quotient (below 70)
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mental retardation

  1. Below-average intellectual ability resulting from a genetic defect, brain injury, or disease, and usually present from birth or early infancy.
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51Թ History and Origins

Origin of mental retardation1

First recorded in 1900–15

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