the act or process of petrifying; the state of being petrified.
something petrified.
Also, petrification [pe-truh-fi-key-shuhn] .

1640–50; petri- + -faction < Latin factiōn- (stem of factiō) a making. See petrify, faction

petrifactive, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
petrifaction or petrification (ˌpɛtrɪˈfækʃən, ˌpɛtrɪfɪˈkeɪʃən)
1.  the act or process of forming petrified organic material
2.  the state of being petrified
petrification or petrification

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

petrifaction pet·ri·fac·tion (pět'rə-fāk'shən) or pet·ri·fi·ca·tion (-fĭ-kā'shən)
A process of fossilization in which dissolved minerals replace organic matter.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
petrifaction (pět'rə-fāk'shən) also petrification   (pět'rə-fāk'shən)  Pronunciation Key 
The process by which organic materials are turned into rock. Petrifaction occurs when water that is rich with inorganic minerals, such as calcium carbonate or silica, passes slowly through organic matter, such as wood or bone, replacing its cellular structure with minerals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Petrification occurs when parts of the organism are saturated with minerals.
To some the word fossilization is synonymous with the word petrification.
The petrification is so perfect that the skull plainly shows a fracture as if made by a heavy weapon.
The decomposition of the ash which released silica for petrification converted the ash into the claylike rock bentonite.
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