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helium

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noun he·li·um \ˈhē-lē-əm, ˈhēl-yəm\

Simple Definition of helium

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

Source: Merriam-Webster's Learner's Dictionary

Full 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

Origin and Etymology of helium

New Latin, from Greek hēlios


First Known Use: 1872


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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