SILICIFY
Etymology
Verb
silicify (third-person singular simple present silicifies, present participle silicifying, simple past and past participle silicified)
(transitive) to impregnate something with silica.
(intransitive) to be impregnated with, or converted into silica.
Source: Wiktionary
Si*lic"i*fy, v. t. [imp. & p. p. Silicified; p. pr. & vb. n.
Silicifying.] Etym: [L. silex, silicis, a flint + -fy: cf. F.
silicifier.] (Chem.)
Definition: To convert into, or to impregnate with, silica, or with the
compounds of silicon.
The specimens found . . . are completely silicified. Say.
Note: The silica may take the form of agate, chalcedony, flint,
hornstone, or crystalline quartz.
Si*lic"i*fy, v. i.
Definition: To become converted into silica, or to be impregnated with
silica.
Source: Webster’s Unabridged Dictionary 1913 Edition