petrology

created by tres equis
(definition) by Webster 1913 (print) Wed Dec 22 1999 at 1:56:56

Pe*trol"o*gy (?), n. [Petro + -logy.]

1.

The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.

2.

A treatise on petrology.

 

© Webster 1913.

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