psychiatry a less common term for mental retardation
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
How to use mental deficiency in a sentence
Alcoholism in the parents is frequently the cause of mental deficiency.Mentally Defective Children | Alfred Binet
One form, easily recognized, is what is commonly called "mental deficiency."The Good Housekeeping Marriage Book | Various
Even if the patient recovers, whether as the result of operation or not, deaf-mutism or mental deficiency frequently occurs.
We know now that, short of real mental deficiency, there is or ought to be no such personage as the dunce.Progress and History | Various
A study of the hereditary transmission of mental deficiency in one family.The Measurement of Intelligence | Lewis Madison Terman