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petrog.
abbreviation
petrography.
petrog.
abbreviation
petrography
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Example Sentences
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Petrog′lyphy, the art of writing on rocks or stones; Petrog′rapher, a student of petrography.—adjs.
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Petrog′raphy, the study of rocks: petrology.—adj.
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Petrog′eny, the science of the origin of rocks; Pet′roglyph, a rock-carving.—adj.
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