helium

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noun he·li·um \ˈhē-lē-əm, ˈhēl-yəm\

Definition of helium

  1. :  a light colorless inert gaseous element found especially in natural gases and used chiefly for inflating airships and balloons, in lamps, in cryogenic research, and as a component of inert atmospheres (as in welding) — see element table

Recent Examples of helium from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'helium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of helium

New Latin, from Greek hēlios


HELIUM Defined for English Language Learners

helium

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noun

Definition of helium for English Language Learners

  • : a chemical element that is a colorless gas, that is lighter than air, and that is often used to fill balloons


HELIUM Defined for Kids

helium

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noun he·li·um \ˈhē-lē-əm\

Definition of helium for Students

  1. :  a very light gaseous chemical element that is found in various natural gases, will not burn, and is used in balloons


Medical Dictionary

helium

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noun he·li·um \ˈhē-lē-əm\

Medical Definition of helium

  1. :  a light colorless nonflammable gaseous element found especially in natural gases and used chiefly for inflating airships and balloons, for filling incandescent lamps, and for cryogenic research—symbol He; see element table



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