emeritus
From Longman Dictionary of Contemporary Englishemerituse‧mer‧i‧tus /ɪˈmerɪtəs/ adjective → emeritus professor/director etcExamples from the Corpusemeritus• Still pro- Perot Stockdale, 71, shifted to emeritus status last month.• George Gerbner, dean emeritus University of Pennsylvania.Origin emeritus (1600-1700) Latin past participle of emereri “to serve one's full time, earn, deserve”