coeducation
From Longman Dictionary of Contemporary EnglishRelated topics: Educationcoeducationco‧ed‧u‧ca‧tion /ˌkəʊedjəˈkeɪʃən $ ˌkoʊedʒə-/ noun [uncountable] SESEX/GENDERa system in which students of both sexes are educated together —coeducational adjectiveExamples from the Corpuscoeducation• In that context, 22-year-old Faulkner said the shaky start to coeducation at the Citadel was little wonder.• The tensions also affect the men who remain in school and prevail under coeducation.