moron

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moron

 [mo´ron]
obsolete term for a person with the highest grade of mental retardation, equivalent to the modern classification “mild mental retardation.”
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

mor·on

(mōr'on), This outmoded and imprecise term is best avoided in medical speech and writing because of its pejorative lay connotations.
An obsolete term for a subclass of mental retardation or a person so classified therein.
[G. mōros, stupid]
Farlex Partner Medical Dictionary © Farlex 2012

moron

(môr′ŏn′)
n.
A person with mild intellectual disability having a mental age of from 7 to 12 years and generally having communication and social skills enabling some degree of academic or vocational education. The term belongs to a classification system no longer in use and is now considered offensive.

mo′ron′ism, mo·ron′i·ty (mə-rŏn′ĭ-tē, mô-) n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

moron

Neurology
An obsolete term formerly used for an individual with mild mental retardation (IQ 50–69).

Vox populi
A derogatory term used indiscriminately for an obtuse person, regardless of that person’s tested IQ.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

moron

A person of a mild to moderate degree of learning difficulty (mental retardation). A person with an IQ of between 50 and 70. The term is not used in medicine. From the Greek moros , stupid.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005