D defs.my
Entry 2 senses Webster, 1913

Petrology

/pət-räl'-əj-ē/ · Pe·trol·o·gy · IPA /pəˈtɹɑl.ə.d͡ʒi/
01 n. The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.
  1. 1.
    The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.
  2. 2.
    A treatise on petrology.