Rn

Dictionary.com Unabridged

R.N.

2.
British. Royal Navy.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
Rn
 
the chemical symbol for
radon

RN
 
abbreviation for
1.  (in Canada) Registered Nurse
2.  Royal Navy
 
symbol for
3.  Niger (international car registration)
 
[(sense 3) From R(epublic of) N(iger)]

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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American Heritage
Medical Dictionary

Rn
The symbol for the element radon.

RN or R.N.
abbr.
registered nurse

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Rn  
The symbol for radon.
radon   (rā'dŏn)  Pronunciation Key 
Symbol Rn
A colorless, odorless, radioactive element in the noble gas group. It is produced by the radioactive decay of radium and occurs in minute amounts in soil, rocks, and the air near the ground. Radon is used as a source of radiation for the treatment of cancer and other diseases. Its most stable isotope is Rn 222 with a half-life of 3.82 days. Atomic number 86; melting point -71°C; boiling point -61.8°C; specific gravity (solid) 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
rn
Kirundi
Rn
radon
RN
  1. Niger (international vehicle ID)

  2. registered nurse

  3. Royal Navy

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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