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M-line

[ em-lahyn ]
/ ˈɛmˌlaɪn /
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noun Physics.
one of a series of lines (M-series ) in the x-ray spectrum of an atom corresponding to radiation (M-radiation ) caused by the transition of an electron to the M-shell.
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Origin of M-line

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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