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axion

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(ak′sē än′)

noun

a hypothetical subatomic particle thought to be a lightweight, electrically neutral boson essential to the strong interaction

See axion in American Heritage Dictionary 4

noun

A hypothetical boson having no charge or spin and small mass, proposed to explain the existence of certain symmetries of the strong nuclear force.

Origin:

Origin: axi(al)

Origin: + -on¹

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