单词 | mercury |
释义 | mercury1/ˈməːkjəri![]() noun [mass noun] 1The chemical element of atomic number 80, a heavy silvery-white metal which is liquid at ordinary temperatures: we completed a programme to test all of our coal-fired plants for mercury and other air-toxins (Symbol: Hg) The wetlands dense foliage has the ability to handle heavy metals, like mercury, zinc, nickel and copper....
1.1The column of mercury in a thermometer or barometer, or its height as indicating atmospheric temperature or pressure: coastal sunshine sends mercury soaring...
1.2 historical Mercury or one of its compounds used medicinally, especially to treat syphilis: one wonders how many unfortunates owed their demise to his prescription of mercury to clarify the spleen...
OriginMiddle English: from Latin Mercurius (see Mercury (sense 1)).
mercury2/ˈməːkjəri![]() noun A plant of a genus which includes dog’s mercury.
OriginMid 16th century: from the genus name, from Latin mercurialis 'of the god Mercury'. Mercury3/ˈməːkjəri![]() 1 Roman Mythology The Roman god of eloquence, skill, trading, and thieving, herald and messenger of the gods, who was identified with Hermes. From Latin Mercurius, from merx, merc- 'merchandise' 1.1Used in names of newspapers and journals: the Leicester Mercury...
2 Astronomy A small planet that is the closest to the sun in the solar system, sometimes visible to the naked eye just after sunset. Mercury orbits within the orbit of Venus at an average distance of 57.9 million km from the sun. With a diameter of 4,878 km it is only a third larger than earth’s moon, which it resembles in having a heavily cratered surface. Its ‘day’ of 58.65 days is precisely two thirds the length of its ‘year’ of 87.97 days. Daytime temperatures average 170°C. There is no atmosphere and the planet has no satellites. |
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