The Collaborative International Dictionary of English v.0.48:
Evaporative \E*vap"o*ra*tive\, a. [L. evaporatius: cf. F. ['e]vaporatif.] Pertaining to, or producing, evaporation; as, the evaporative process. [1913 Webster]WordNet (r) 3.0 (2006):
evaporative adj 1: relating to or causing or being caused by evaporation; "an evaporative cooler"