Meaning of “hydrogen” in the English Dictionary

american-english dictionary

"hydrogen" in British English

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hydrogennoun [ U ]

uk /ˈhaɪ.drə.dʒən/ us /ˈhaɪ.drə.dʒən/ symbol H


  • It was the end of commercial hydrogen airships.
  • The gas used in the balloon is helium, which is not explosive like hydrogen, and therefore not as dangerous.
  • The water coming through the vents is very rich in chemicals like hydrogen sulfide.
  • These “ships of the sky” had a long metal frame covered by material that was then filled with a lighter-than-air gas, normally hydrogen.
  • Water is made up of two chemicals, hydrogen and oxygen.

(Definition of “hydrogen” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"hydrogen" in American English

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hydrogennoun [ U ]

us /ˈhɑɪ·drə·dʒən/

physics the lightest gas, one of the chemical elements, and having no color, taste, or smell

(Definition of “hydrogen” from the Cambridge Academic Content Dictionary © Cambridge University Press)