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  1. hy·dro·gen
    IPA[ˈhīdrəjən]
  2. noun

    • 1. a colorless, odorless, highly flammable gas, the chemical element of atomic number 1.

  3. Variation

    • n.: noun: hydrogen

    • noun

      a colourless, odourless, highly flammable gas, the chemical element of atomic number 1.
    • noun

      a colorless poisonous gas with a smell of rotten eggs, made by the action of acids on sulfides.
    • noun

      an immensely powerful bomb whose destructive power comes from the rapid release of energy during the nuclear fusion of isotopes of hydrogen (deuterium and tritium), using an atom bomb as a trigger.
    • noun

      a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
    • noun

      another term for deuterium
    • noun

      a highly poisonous gas or volatile liquid with an odor of bitter almonds, made by the action of acids on cyanides.
    • noun

      archaic term for hydrogen sulfide
    • noun

      a colorless, viscous, unstable liquid with strong oxidizing properties, commonly used in diluted form in disinfectants and bleaches.
    • noun

      a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
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