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axion

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noun ax·ion \ˈak-sē-(ˌ)än\

Definition of axion

  1. :  a hypothetical subatomic particle of low mass and energy that is postulated to exist because of certain properties of the strong force



Origin of axion

axial + 2-on


First Known Use: 1978


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a timid, meek, or unassertive person

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