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M-line

American  
[em-lahyn] / ˈɛmˌlaɪn /

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.

Etymology

Origin of M-line

First recorded in 1920–25

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.