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(uncountable) The chemical element (symbol Ne) with an atomic number of 10. The second of the noble gases, it is a colourless, odorless inert gas. / (countable) A form or sample of the element.

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neon

/ˈni.ɒn/

noun

(uncountable) The chemical element (symbol Ne) with an atomic number of 10. The second of the noble gases, it is a colourless, odorless inert gas. / (countable) A form or sample of the element.