any of certain amorphous gelatinous masses, formed when alkaline silicates are treated with acids, which dissociate readily into silica and water.
a white gelatinous substance obtained by adding an acid to a solution of sodium silicate. It has an ill-defined composition and is best regarded as hydrated silica, SiO2.nH2O
noun, Chemistry. 1. a compound of two elements, one of which is silicon. noun 1. any one of a class of binary compounds formed between silicon and certain metals
[sil-uh-sif-er-uh s] /ˌsɪl əˈsɪf ər əs/ adjective 1. containing, combined with, or producing silica. siliciferous /ˌsɪlɪˈsɪfərəs/ adjective 1. containing or yielding silicon or silica
verb (used with or without object), silicified, silicifying. 1. to convert or be converted into silica. verb -fies, -fying, -fied 1. to convert or be converted into silica: silicified wood
noun 1. wood that has been changed into quartz by a replacement of the cellular structure of the wood by siliceous waters.