Silicify

• POS: Verb (usu participle)
• HYPHEN: si=lic=i=fy

CIDE DICTIONARY

Silicify, v. t. [L. silex, silicis, a flint + -fy: cf. F. silicifier.].

 To convert into, or to impregnate with, silica, or with the compounds of silicon.  [1913 Webster]
" The silica may take the form of agate, chalcedony, flint, hornstone, or crystalline quartz."  [1913 Webster]
"The specimens found . . . are completely silicified."  [1913 Webster]

Silicify, v. i. 

 To become converted into silica, or to be impregnated with silica.  [1913 Webster]