Polysilicic /(?)/

Pol·y·si·lic·ic

Polysilicic

a.
  1. Of or pertaining to compounds formed by the condensation of two or more molecules of silicic acid. (Chem.)

Phrases & Compounds
Polysilicic acid
any one of a series of acids formed by the condensation of two or more molecules of silicic acid, with elimination of water.