helium (1 synonym found)

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Definition of helium:

(n) : a colorless and inert gas, and the second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602
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Definition of helium:

(n) : a colorless and inert gas, and the second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602

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