pe·​trol·​o·​gy | \ pə-ˈträ-lə-jē How to pronounce petrology (audio) , pe- \

Definition of petrology

: a science that deals with the origin, history, occurrence, structure, chemical composition, and classification of rocks

Keep scrolling for more

Other Words from petrology

petrologic \ ˌpe-​trə-​ˈlä-​jik How to pronounce petrology (audio) \ or petrological \ ˌpe-​trə-​ˈlä-​ji-​kəl How to pronounce petrology (audio) \ adjective
petrologically \ ˌpe-​trə-​ˈlä-​ji-​k(ə-​)lē How to pronounce petrology (audio) \ adverb
petrologist \ pə-​ˈträ-​lə-​jist How to pronounce petrology (audio) , pe-​ \ noun

Examples of petrology in a Sentence

Recent Examples on the Web Finally, in early August I’ll be headed to a SERC workshop on teaching mineralogy, petrology and geochemistry in Minneapolis – Erik Klemetti, WIRED, "Summer Schedule 2011," 7 June 2011

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'petrology.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of petrology

1811, in the meaning defined above

History and Etymology for petrology

petro- + -logy

Keep scrolling for more

Learn More about petrology

Time Traveler for petrology

Time Traveler

The first known use of petrology was in 1811

See more words from the same year

Statistics for petrology

Cite this Entry

“Petrology.” Dictionary, Merriam-Webster, Accessed 16 Jan. 2021.

More from Merriam-Webster on petrology Encyclopedia article about petrology

Comments on petrology

What made you want to look up petrology? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!