petrology
n. கல்லாய்வு நுல், கற்பாறைகளின் தோற்றம், அமைப்பு முதலியவை பற்றிய நுல்.
Pe*trol"o*gy, n. Etym: [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.