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mR

milliroentgen; milliroentgens.
Also, mr.

Mr.

[mis-ter]
plural Messrs. [mes-erz]
1.
mister: a title of respect prefixed to a man's name or position: Mr. Lawson; Mr. President.
2.
a title prefixed to a mock surname that is used to represent possession of a particular attribute, identity, etc., especially in an idealized or excessive way: Mr. Democrat; Mr. Perfect; Mr. Macho.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
Mr (ˈmɪstə)
 
n , pl Messrs
1.  a title used before a man's name or names or before some office that he holds: Mr Jones; Mr President
2.  (in military contexts) a title used in addressing a warrant officer, officer cadet, or junior naval officer
3.  a title placed before the surname of a surgeon
 
[C17: abbreviation of mister]

MR
 
abbreviation for
1.  Master of the Rolls
2.  motivation(al) research

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

Mr.
1447, abbreviation of master (q.v.). Used from 1814 with a following noun or adj., to denote "the exemplar or embodiment of that quality" (e.g. Mr. Right, 1922, first in James Joyce; Mr. Fix-It, 1925, first in Ring Lardner; Mr. Big, 1940, first in Groucho Marx). The pl. Messrs. (1779) is an abbreviation
of Fr. messieurs, pl. of monsieur, used in Eng. to supply the pl. of Mr., which is lacking.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

mr definition

networking
The country code for Mauritania.
(1999-01-27)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
mr
  1. Marathi

  2. milliradian

mR
milliroentgen
MR
  1. medium rate

  2. mental retardation

  3. metabolic rate

  4. mitral regurgitation

Mr.
mister (Used as a courtesy title for a man)
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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Example sentences for mr
A woman got onto the elevator, recognized him and said, i have to tell you, mr.
He often features a character singing along to a song from the soundtrack mr.
In every movie, one or two characters have a zippo lighter mr.
The journal developed a number of pseudonymous characters, including mr.
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