helium

/ˈhiːli.əm/

IPA: /HH IY1 L IY0 AH0 M/

noun
  1. 1

    The second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.

  2. 2

    A form or sample of the element.

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Source: https://en.wiktionary.org/wiki/helium

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