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hydrofluoric acid
hydrofoil
hydroforming
hydrogasification
hydrogel
hydrogen
hydrogen bomb
hydrogen bond
hydrogen bromide
hydrogen carbonate
hydrogen chloride
hydrogen cyanide
hydrogen embrittlement
hydrogen fluoride
hydrogen iodide
hydrogen ion
hydrogen peroxide
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hydrogen bromide
hy·dro·gen bro·mide


noun 
Definition:
 
colorless gas: a colorless gas usually made by the combination of hydrogen and bromine in the presence of a catalyst such as platinum. It forms hydrobromic acid in water solution. HBr
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