The Collaborative International Dictionary
malepractice
Malpractice \Mal*prac"tice\, n. [Mal- + practice.] Evil practice; illegal or immoral conduct; practice contrary to established rules; specifically, the treatment of a case by a surgeon or physician in a manner which is contrary to accepted rules and productive of unfavorable results.
Wiktionary
malepractice
n. (archaic form of malpractice English)