The Collaborative International Dictionary of English v.0.48:
Implemental \Im`ple*men"tal\, a. Pertaining to, or characterized by, implements or their use; mechanical. [1913 Webster]WordNet (r) 3.0 (2006):
implemental adj 1: serving or acting as a means or aid; "instrumental in solving the crime" [syn: implemental, instrumental, subservient]