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fossilize

verb [I] (UK usually fossilise)
 
 
/ˈfɒs.ɪ.laɪz/ US  /ˈfɑː.səl.aɪz/

Definition

to become a fossil: The remains gradually fossilized.Palaeontology and fossils fossilization (UK usually fossilisation)
 
 
/ˌfɒs.ɪ.laɪˈzeɪ.ʃən/ US  /ˌfɑː.səl.aɪ-/ noun [U]
(Definition of fossilize verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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