Home › Words › W › waterglasswaterglasswaterglass means sodium silicate.Among words judged in Lexicurio's Arena, waterglass ranks #16,730 of 42,749 for Qualifying.EtymologyFrom water + glass.nounSodium silicate.e.g.“a cheaper process for fire-proofing canvas, consisting of the deposition in the fiber of a double sodium and lead silicate. Boiling solutions of basic lead acetate and of waterglass were used.” — 1895, Thomas Norton, The Contributions of Chemistry to the Methods of Preventing and Extinguishing Conflagration, page 15:Definitions & examples from Wiktionary (CC BY-SA 3.0).