M-line

[em-lahyn]

noun

Physics.

1. 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.

Word History and Origins

Origin of M-line¹

First recorded in 1920–25

Example Sentences

Ana Morse, who moved into a three-bedroom at the Solaire in Battery Park City with her husband and two young children last month, put their names on a waiting list last fall, specifically for an apartment in the building’s M-line on a high floor.

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