hydrogen
US /ˈhaɪ.drə.dʒən/
UK /ˈhaɪ.drə.dʒən/
1.
hydrogène
a colorless, odorless, highly flammable gaseous element, the lightest of all elements, and the most abundant chemical substance in the universe, occurring in water and all organic compounds.
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Water is composed of hydrogen and oxygen.
L'eau est composée d'hydrogène et d'oxygène.
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Scientists are exploring hydrogen as a clean energy source.
Les scientifiques explorent l'hydrogène comme source d'énergie propre.