The term feeble-minded's documented in use as early the 19th century through to the early 20th century as a loose description of a variety of mental deficiencies, including what'd now be considered mental retardation in its various types and grades, and learning disabilities such as dyslexia. A Times Editorial of November 1834 describes the long serving former Prime Minister Lord Liverpool as a feeble-minded pedant of office. Despite being pejorative, the term was considered, along with idiot an… (More on Feeble-minded)