un silicified


verb (used with object), verb (used without object), silicified, silicifying.
to convert or be converted into silica.

1820–30; silic(a) + -ify

silicification, noun
unsilicified, adjective
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World English Dictionary
silicify (sɪˈlɪsɪˌfaɪ)
vb , -fies, -fying, -fied
to convert or be converted into silica: silicified wood

Collins English Dictionary - Complete & Unabridged 10th Edition
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