from
The Collaborative International Dictionary of English v.0.48
Geology \Ge*ol"o*gy\, n.; pl. {Geologies}. [Gr. ge`a, gh^, the
earth + -logy: cf. F. g['e]ologie.]
[1913 Webster]
1. The science which treats:
(a) Of the structure and mineral constitution of the
globe; structural geology.
(b) Of its history as regards rocks, minerals, rivers,
valleys, mountains, climates, life, etc.; historical
geology.
(c) Of the causes and methods by which its structure,
features, changes, and conditions have been produced;
dynamical geology. See Chart of {The Geological
Series}.
[1913 Webster]
2. A treatise on the science.
[1913 Webster]