adj. (chemistry) Of or pertaining to any polymer of silicic acid
the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to compounds formed by the condensation of two or more molecules of silicic acid.
The Century Dictionary and Cyclopedia
Noting an acid which may be viewed as containing two or more combining units of silicon dioxid combined with the elements of water, as the hypothetical acid represented by the formula H4Si3O8= (H2O)2.(SiO2)3.
Word Usage
"~ One of the most common constituents of rocks is feldspar (KAlSi_ O_ ), a mixed salt of potassium and aluminium with the polysilicic acid (H_ Si_ O_ )."