in‧ter‧de‧part‧men‧tal /ˌɪntəˌdiːpɑːtˈmentl $ ˌɪntərdɪˌpɑːrtˈmentl/
adjective [usually before noun] between or involving different departments of a company, government etc:
intense interdepartmental rivalry [TahlilGaran] Dictionary of Contemporary English ▲