Dictionary

helium

noun he·li·um \ˈhē-lē-əm, ˈhēl-yəm\

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

Full Definition of HELIUM

:  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
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Origin of HELIUM

New Latin, from Greek hēlios
First Known Use: 1872
HELIUM Defined for Kids

helium

noun he·li·um \ˈhē-lē-əm\

Definition of HELIUM for Kids

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

helium

noun he·li·um \ˈhē-lē-əm\

Medical Definition of HELIUM

:  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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