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British. Royal Navy. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for Rn
Contemporary Examples
Historical Examples
  • "He is searching for words," thought Henry, without in any way coming to Rn's rescue.

    Marguerite de Valois Alexandre Dumas
  • Tod says that almost all the princes of Rjastn followed the Rn at Kanw.

    The Bbur-nma in English Babur, Emperor of Hindustan
  • But the previous evening she had written him, and Rn had brought the answer to her note in person.

    Marguerite de Valois Alexandre Dumas
  • Rn Ronsard accepted it with a slight but not over-obsequious salutation.

    Temporal Power Marie Corelli
  • The same country was the starting-point of another explorer, Rn Cailli.

  • You admit, then, that you were at Rn's with Monsieur de la Mole?

    Marguerite de Valois Alexandre Dumas
  • Rn hurried downstairs and put his ear against the door, without opening it.

    Marguerite de Valois Alexandre Dumas
  • Rn drew a paper from his pocket and handed it to Catharine, who hastily unfolded it.

    Marguerite de Valois Alexandre Dumas
  • How can you tell me a secret which is not yours, Rn, especially when the secret is such an important one?

    Marguerite de Valois Alexandre Dumas
British Dictionary definitions for Rn


Chemical symbol


(in Canada) Registered Nurse
Royal Navy
Niger (international car registration)
Word Origin
(sense 3) From R(epublic of) N(iger)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Rn in Medicine

The symbol for the element radon.

RN or R.N.
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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Rn in Science
The symbol for radon.
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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