The Collaborative International Dictionary of English v.0.48:
Geologic \Ge`o*log"ic\, Geological \Ge`o*log"ic*al\, a. [Cf. F. g['e]ologique.] Of or pertaining to geology, or the science of the earth. [1913 Webster]WordNet (r) 3.0 (2006):
geological adj 1: of or relating to or based on geology; "geological formations"; "geologic forces" [syn: geological, geologic]