[ em-lahyn ]
/ ˈɛmˌlaɪn /

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.

Origin of M-line

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for m line

M line


A fine dark band in the center of the H band in the myofibrils of striated muscle fibers.M band
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.