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[dahy-uh-jen-uh-sis] /ˌdaɪ əˈdʒɛn ə sɪs/
noun, Geology.
the physical and chemical changes occurring in sediments between the times of deposition and solidification.
Origin of diagenesis
From New Latin, dating back to 1885-90; See origin at dia-, -genesis
Related forms
[dahy-uh-juh-net-ik] /ˌdaɪ ə dʒəˈnɛt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for diagenetic


the sum of the physical, chemical, and biological changes that take place in sediments as they become consolidated into rocks, including compaction and cementation, but excluding weathering and metamorphic changes
(chem) recrystallization of a solid to form large crystal grains from smaller ones
Derived Forms
diagenetic (ˌdaɪədʒəˈnɛtɪk) adjective
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
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diagenetic in Science
The process by which sediment undergoes chemical and physical changes during its lithification (conversion to rock). Compaction, leaching, cementation, and recrystallization are all forms of diagenesis. Erosion and metamorphism are not. Oil, gas, and coal form through the diagenesis of organic sedimentary matter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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