chromium
noun/ˈkrəʊmiəm/
/ˈkrəʊmiəm/
[uncountable] (symbol Cr)
- 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
Word Originearly 19th cent.: from chrome + -ium.
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chromium