petrology
pet·ro·logy
noun
1.
the branch of geology that studies rocks: their origin and formation and mineral composition and classification
Origin
From petro- + -logy.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.