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Definition of atomic spectrum noun from the Oxford Advanced Learner's Dictionary

atomic spectrum

noun

/əˌtɒmɪk ˈspektrəm/

/əˌtɑːmɪk ˈspektrəm/

(chemistry)

(plural atomic spectra)

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a series of lines with characteristic frequencies that show the range of radiation that is characteristic of a chemical element

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See atomic spectrum in the Oxford Advanced American Dictionary

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adverb

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