Lithology

n. scientific study of the composition and nature of stones and rocks (Mineralogy); study of calculi in the human body (Medicine)

Petrology (from Greek: πέτρα, petra, rock; and λόγος, logos, knowledge) is a field of geology that focuses on the study of rocks and the conditions on which they form. The word lithology once was approximately synonymous with petrography, but today lithology is essentially a subdivision of petrology focusing on macroscopic hand-sample or outcrop-scale description of rocks.
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(n.)
The science which treats of rocks, as regards their mineral constitution and classification, and their mode of occurrence in nature.
  

(n.)
A treatise on stones found in the body.
  

Mineralogy, grain size, texture, and other physical properties of granular soil, sediment, or rock.

n.
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