We found 26 dictionaries that define the word petrology:

General (22 matching dictionaries)

1. petrology: Merriam-Webster
2. petrology: Oxford Learner's Dictionaries
3. petrology: American Heritage Dictionary of the English Language
4. petrology: Collins English Dictionary
5. petrology: Vocabulary.com
6. Petrology, petrology: Wordnik
7. petrology: Wiktionary
8. petrology: Webster's New World College Dictionary, 4th Ed.
9. petrology: The Wordsmyth English Dictionary-Thesaurus
10. petrology: Infoplease Dictionary
11. petrology: Dictionary.com
12. Petrology: Wikipedia, the Free Encyclopedia
13. Petrology: Online Plain Text English Dictionary
14. petrology: Webster's Revised Unabridged, 1913 Edition
15. petrology: Rhymezone
16. Petrology: AllWords.com Multi-Lingual Dictionary
17. petrology: FreeDictionary.org
18. petrology: The Phrontistery - A Dictionary of Obscure Words
19. petrology: Mnemonic Dictionary
20. petrology: TheFreeDictionary.com

Computing (1 matching dictionary)

21. petrology: Encyclopedia

Medicine (1 matching dictionary)

22. online medical dictionary (No longer online)

Science (1 matching dictionary)

23. Archaeology Wordsmith (No longer online)

Tech (1 matching dictionary)

24. Schlumberger Oilfield Glossary (No longer online)

(Note: See petrologic as well.)

Definitions from Wiktionary ( ) ▸ noun:  (geology) The study of the origin, composition and structure of rock. Similar: petrography, petrogeny, petrogenesis, petrogeology, petrophysics, geology, petrochemistry, petrochemist, morphology, lithology, more... Opposite: aerology, limnology, pedology, meteorology, hydrology Types: sedimentary, igneous, metamorphic, more... Phrases: igneous petrology, experimental petrology, more... Adjectives: metamorphic, experimental, igneous, structural, sedimentary, theoretical, modern, ceramic, organic, microscopic, regional Colors:     gray,     black,     white,     brown,     beige, more... ▸ Words similar to petrology ▸ Usage examples for petrology ▸ Idioms related to petrology ▸ Wikipedia articles (New!) ▸ Popular adjectives describing petrology ▸ Words that often appear near petrology ▸ Rhymes of petrology ▸ Invented words related to petrology