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hydrogen definition

hydro·gen (hī′drə jən)

noun

a flammable, colorless, odorless, gaseous chemical element, the lightest of all known substances: symbol, H; at. no., 1

Etymology: Fr hydrogène (see hydro- & -gen): coined (1787) by L. B. Guyton de Morveau (1737-1816), Fr chemist, in reference to the generation of water from the combustion of hydrogen

Related Forms:

  • hydrogenous hy·drog′·enous (hī dräj′ə nəs) adjective

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