mercury 
1. a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures (Freq. 6) • Syn: quicksilver, hydrargyrum, Hg, atomic number 80 • Derivationally related forms: mercurial, mercuric, mercurous • Hypernyms: metallic element, metal • Substance Holonyms: cinnabar, calomel, mercurous chloride 2. temperature measured by a mercury thermometer - the mercury was falling rapidly • Hypernyms: temperature
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