a. [ L. filix, -icis, a fern. ] (Chem.) Pertaining to, or derived from, ferns;
a. [ L. silex, silicis, a flint: cf. F. silicique. ] (Chem.) Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon;
Silicic acid (Chem.),
a. Consisting of silica and calcareous matter. [ 1913 Webster ]