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M-day

[em-dey] /ˈɛmˌdeɪ/
noun, Military
1.
mobilization day: a day assumed by the Department of Defense as the first day of mobilization, used by the military for planning purposes.
Origin
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Related Abbreviations for m day

M-day

mobilization day
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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