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Definition of: geology
(jē·ol′ə·jē) noun plural ·gies
1. The science that treats of the origin, history, constitution, and structure of the earth, including the operation of the physical forces affecting its development and appearance and the history of living or extinct forms as recorded in the rocks. See Time Scale above.
2. A treatiseon this Subject. See HISTORICAL GEOLOGY.
—ge·o·log·ic (jē′ə·loj′ik) or ·i·cal adjective
—ge′o·log′i·cal·ly adverb
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