Definition of “helium” - English Dictionary

british dictionary

“helium” in British English

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heliumnoun [ U ]

uk /ˈhiː.li.əm/ us /ˈhiː.li.əm/ symbol He

Examples

  • But soon, balloonists started to use lighter-than-air gases like helium and hydrogen inside the balloon to fly higher.
  • Hot air balloons are more common, but many of the high altitude balloons use helium gas.
  • The gas used in the balloon is helium, which is not explosive like hydrogen, and therefore not as dangerous.

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

“helium” in American English

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heliumnoun [ U ]

us /ˈhi·li·əm/

a gas, one of the chemical elements, that is lighter than air and will not burn

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