A type of glass that contains iron oxide, giving it a dark green or brown color and used in applications like glass bottles and protective eyewear.
From 'ferro-' (iron) + 'glass' (from Latin 'glassa'). The term emerged in industrial chemistry as manufacturers categorized different glass types by their composition, particularly regarding iron content.
Most beer bottles are ferroglass—the iron oxide makes them dark green or brown to block light, which prevents the beer from developing a 'skunky' flavor caused by light-induced chemical reactions!
Complete word intelligence in one call. Free tier — 50 lookups/day.