Petrology

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Petrology \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.
        [1913 Webster]
  


     2. A treatise on petrology.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  petrology
       n : the branch of geology that studies rocks: their origin and
           formation and composition