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BNC: 22644 COCA: 17129

chromium

noun
/ˈkrəʊmiəm/
/ˈkrəʊmiəm/
[uncountable]
(symbol Cr)
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  1. a chemical element. Chromium is a hard grey metal that shines brightly when polished (= made smooth and shiny by being rubbed) and is often used to cover other metals in order to prevent them from rusting.
    • chromium-plated steel镀铬的钢
    Word Originearly 19th cent.: from chrome + -ium.

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