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Definition of: petrology
(pə·trol′ə·jē) noun
The science of the origin, structure, constitution, and characteristics of rocks: a branch of geology.
—pet·ro·log·ic (pet′rə·loj′ik) or ·i·cal adjective
—pet′ro·log′cal·ly adverb
—pe·trol′o·gist noun
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