[ pi-trol-uh-jee ]
/ pɪˈtrɒl ə dʒi /


the scientific study of rocks, including petrography and petrogenesis.

Origin of petrology

First recorded in 1805–15; petro-1 + -logy

Related forms

pet·ro·log·ic [pe-truh-loj-ik] /ˌpɛ trəˈlɒdʒ ɪk/, pet·ro·log·i·cal, adjectivepet·ro·log·i·cal·ly, adverbpe·trol·o·gist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for petrologist

  • From a climber's rather than a petrologist's point of view, volcanic rocks are liable to seem both very hard and very brittle.

    The Alps|Martin Conway

British Dictionary definitions for petrologist


/ (pɛˈtrɒlədʒɪ) /

noun plural -gies

the study of the composition, origin, structure, and formation of rocksAbbreviation: petrol

Derived Forms

petrological (ˌpɛtrəˈlɒdʒɪkəl), adjectivepetrologically, adverbpetrologist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for petrologist


[ pə-trŏlə-jē ]

The scientific study of the origin, composition, and structure of rocks.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.