collaborative

from WordNet (r) 3.0 (2006)

collaborative
    adj 1: accomplished by collaboration; "collaborative research"

from The Collaborative International Dictionary of English v.0.48

collaborative \col*lab"o*rat*ive\, a.
   accomplished by collaboration; cooperative; as, collaborative
   effort of industry and the universities. Opposed to
   {competitive}.
   [PJC]