lithology Meaning, Definition & Usage

  1. noun the branch of geology that studies rocks: their origin and formation and mineral composition and classification
    petrology.

WordNet

Li*thol"o*gy noun
Etymology
Litho- + -logy: cf. F. lithologie.
Definitions
  1. The science which treats of rocks, as regards their mineral constitution and classification, and their mode of occurrence in nature.
  2. (Med.) A treatise on stones found in the body.

Webster 1913