|Definition - A speech impairment that is caused by either defective speech organs or impaired motor nerves.|
Etymology - The word was coined by combining the Greek dys, bad, with lalia, a speaking.
Oxford English Dictionary - Its first citation is from 1878:
"The latter [lalopathia] thus includes *dysarthrias (including dyslalias and dysphasias)."
(Ziemssen's Cycl. Med. XIV. 613 )