Definition of "hydrargyrum" []

• The element mercury. (noun)

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• "Washington: India American teenager Kavya Shivashankar finally won it all in the televised US National Spelling Bee competition, nailing esoteric words from "hydrargyrum" to "Laodicean", coolly writing them down with her finger on her palm."
• "First, the budding neurosurgeon correctly spelled "hydrargyrum", as chemists call mercury or quicksilver."
• "The symbol for mercury, Hg, was derived from the name, hydrargyrum."