Moron

Moron is an old term to describe a person with an intellectual disability.Rafter, Nicole Hahn (1998). Creating Born Criminals. University of Illinois Press,  The term was closely tied with the American eugenics movement.Black, Edwin (2004). War Against the Weak: Eugenics and America's Campaign to Create a Master Race. Thunder's Mouth Press,   The term became more widespread, and people started using it as an insult.  It is similar to the words imbecile and idiot. 

 History 
In 1910, psychologist Henry H. Goddard first used the word. Trent, James W. Jr. (2017). Inventing the Feeble Mind: A History of Intellectual Disability in the United States. Oxford University Press,   He based it on the Ancient Greek word μωρός (moros), which meant "dull".μωρός, Henry George Liddell, Robert Scott, A Greek–English Lexicon, on Perseus Digital Library He used it for adults who had a mental age of a 7- 10 year old on the Binet scale.. It was once applied to people with an intelligence quotient (IQ) of 51–70. This meant it was slighlty better than "imbecile" (IQ of 26–50) and much better than "idiot" (IQ of 0–25). During some time, psychologists used the word moron, along with others including "idiotic", "imbecilic", "stupid", and "feeble-minded" to classify people, but they no longer do.Zenderland, Leila (2001). Measuring Minds: Henry Herbert Goddard and the Origins of American Intelligence Testing. Cambridge University Press, 

Other information
Psychologists stopped using the term altogether.

 References 

Category:Disability