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A Writer's Dictionary:

hydrogen Definition


Dictionary Home » Words Starting with H » hybridism ... hydropathy » hydrogen


hydrogen
noun
    1. (symbol H, atomic number 1) a flammable colourless odourless gas which is the lightest of all known substances and by far the most abundant element in the universe.
Etymology: 18c: from French hydrogène, from hydro- + Greek gennaein to produce.



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