petrogenesis [pe-troh-jen-uh-sis] WORD ORIGIN noun the branch of petrology dealing with the origin and formation of rocks. the origin and formation of rocks.
Origin of petrogenesis First recorded in 1900–05;+ Also called pe·trog·e·ny [pi-troj-uh-nee] /pɪˈtrɒdʒ ə ni/. Related formspet·ro·ge·net·ic [pe-troh-juh-net-ik] /ˌpɛ troʊ dʒəˈnɛt ɪk/, adjective Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 petrogenesis in Science petrogenesis [pĕt′rō-jĕn′ĭ-sĭs] The branch of petrology that deals with the origin and formation of rocks, especially igneous rocks. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.