chromium

chromium
noun
  1. [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)
  2. 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
语源
  1. early 19th cent.: from chrome + -ium
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