The Collaborative International Dictionary of English v.0.48:
Etiological \E`ti*o*log"ic*al\, a. Pertaining to, or inquiring into, causes; [ae]tiological. [1913 Webster]WordNet (r) 3.0 (2006):
etiological adj 1: of or relating to the philosophical study of causation [syn: etiological, etiologic, aetiological, aetiologic] 2: relating to the etiology of a disease; "etiological agent" [syn: etiological, etiologic, aetiological, aetiologic]