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| mer·cu·ry [ múrkyəree ] (plural mer·cu·ry or mer·cu·ries) |
noun |
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| Definition: |
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1. liquid metallic element: a poisonous heavy silver-white metallic element that is liquid at room temperature. Source: cinnabar. Use: thermometers, barometers, pharmaceuticals, dental fillings, lamps.
Symbol Hg
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2. temperature or pressure: the mercury in a weather thermometer or barometer, or the air temperature or pressure it indicates
 The mercury rose steadily throughout the early part of the day.
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3. weedy plant: a weedy plant of either of two genera, especially one belonging to the spurge family. Genera Mercurialis, Acalypha.
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| [14th century. < Latin Mercurius (see Mercury)] |
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