a. [ L. silex, silicis, a flint: cf. F. silicique. ] (Chem.) Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid. [ 1913 Webster ]

Silicic acid (Chem.), an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts; -- called also orthosilicic acid or normal silicic acid. [ 1913 Webster ]

a. Consisting of silica and calcareous matter. [ 1913 Webster ]

n. (Chem.) A binary compound of silicon, or one regarded as binary. [ R. ] [ 1913 Webster ]

Hydrogen silicide (Chem.), a colorless, spontaneously inflammable gas, SiH4, produced artifically from silicon, and analogous to methane; -- called also silico-methane, silicon hydride, and formerly siliciureted hydrogen. [ 1913 Webster ]

a. [ L. silex, silicis, a flint + -ferous. ] Producing silica; united with silica. [ 1913 Webster ]

n. [ See Silicify. ] (Chem.) Thae act or process of combining or impregnating with silicon or silica; the state of being so combined or impregnated; as, the silicification of wood. [ 1913 Webster ]

a. (Chem.) Combined or impregnated with silicon or silica, especially the latter; as, silicified wood. [ 1913 Webster ]

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

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. [ 1913 Webster ]

The specimens found . . . are completely silicified. Say. [ 1913 Webster ]

☞ The silica may take the form of agate, chalcedony, flint, hornstone, or crystalline quartz. [ 1913 Webster ]

‖n. pl. (Zool.) Same as Silicoidea. [ 1913 Webster ]

a. See Siliceous. [ 1913 Webster ]