[mass noun]the chemical element of atomic number 24, a hard white metal used in stainless steel and other alloys(Symbol: Cr) (化学元素)铬(符号:Cr)
A transition metal, chromium is used in stainless steel and other alloys, and as a shiny decorative and corrosion-resistant plating. Its chief ore is chromite. Many chromium salts are brightly coloured and are used in dyes and pigments, and in tanning leather