Si‐lic″i‐fy (?), v. t. [imp. & p. p.Silicified (?); p. pr. & vb. n.Silicifying (?).] [L. silex, silicis, a flint + -fy: cf. F. silicifier.] (Chem.) To convert into, or to impregnate with, silica, or with the compounds of silicon.
The specimens found... are completely silicified. Say.
☞ The silica may take the form of agate, chalcedony, flint, hornstone, or crystalline quartz.