Definition of "petrology" []

• The branch of geology that deals with the origin, composition, structure, and alteration of rocks. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This word petrology should be understood not from the more familiar oil of rocks but from what is in English an apparent pun by Jesus in the New Testament."
• ""Oh yes ... petrology, which is, of course, the broad study of rocks including their interpretation and description."
• ""Oh yes … petrology, which is, of course, the broad study of rocks including their interpretation and description."