I. jēˈäləjē, -ji noun
( -es )
Usage: often attributive
Etymology: New Latin geologia, from geo- ge- + -logia -logy
1. : a science that deals with the history of the earth and its life especially as recorded in the rocks — see dynamic geology , economic geology , engineering geology , geognosy , historical geology , paleontologic geology , physical geology , physiographic geology , stratigraphy , structural geology
2. : the geologic features of an area : the attributes of rocks, rock formations, or rock constituents of a district
the geology of Massachusetts
3. : a treatise on geology
II. noun
: the study of the solid matter of a celestial body