hydrogen

hydrogen
[ˈhʌɪdrədʒ(ə)n]
noun
  1. [mass noun]a colourless, odourless, highly flammable gas, the chemical element of atomic number 1(Symbol: H)
    (化学元素)氢(符号: H)
  2. Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. It is by far the commonest element in the universe, although not on the earth, where it occurs chiefly combined with oxygen as water
派生
hydrogenous
[-ˈdrɒdʒɪnəs]
adjective
语源
  1. late 18th cent.: coined in French from Greek hudro- 'water' + -genēs (see -gen)
英语宝典
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