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PR

1.
2.
percentile rank.
3.
public relations.
4.
Slang: Often Disparaging and Offensive. Puerto Rican.
5.
Puerto Rico (approved especially for use with zip code).

Pr

Pr

Symbol, Chemistry

Pr.

1.
(of stock) preferred.
2.
3.

pr.

1.
pair; pairs.
2.
3.
5.
(of stock) preferred.
6.
7.
8.
9.
Computers. printer.
10.
11.

P.R.1

1.
Roman people.
Origin
< Latin populus Rōmānus

P.R.2

1.
parliamentary report.
2.
press release.
3.
prize ring.
4.
proportional representation.
5.
public relations.
Also, p.r.
6.
Puerto Rico.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for PR

pr1

abbreviation
1.
(pl) prs. pair
2.
paper
3.
(in prescriptions) per rectum
4.
power
Word Origin
(sense 3) Latin: through the rectum; to be inserted into the anus

pr2

abbreviation
1.
Puerto Rico

Pr

Chemical symbol
1.
praseodymium

PR

abbreviation
1.
proportional representation
2.
public relations
3.
Puerto Rico

Pr.

abbreviation
1.
Priest
2.
Prince
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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Word Origin and History for PR
n.

also p.r.; 1942, abbreviation of public relations (see public).

Online Etymology Dictionary, © 2010 Douglas Harper
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PR in Medicine

Pr 1

The symbol for the element praseodymium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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PR in Science
Pr  
The symbol for praseodymium.
praseodymium
  (prā'zē-ō-dĭm'ē-əm)   
Symbol Pr
A soft, malleable, silvery metallic element of the lanthanide series that develops a green tarnish in air. It is used to add a yellow tint to glass and ceramics and to make the glass used in welding goggles. Atomic number 59; atomic weight 140.908; melting point 935°C; boiling point 3,127°C; specific gravity 6.8; valence 3, 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for PR

PR

modifier

: the PR department

noun

Public relations (1940s+)


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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PR in Technology

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

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Related Abbreviations for PR

pr

preferences

Pr

  1. praseodymium
  2. propyl
  3. Proverbs

PR

  1. payroll
  2. proportional representation
  3. public relations
  4. Puerto Rico

pr.

  1. pair
  2. present
  3. printed
  4. printing
  5. pronoun

p.r.

Latin punctum remotum (far point)
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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Encyclopedia Article for PR

Pr

((Pr), chemical element, rare-earth metal of transition Group IIIb of the periodic table, used as the element in special alloys and, as its oxide, in glasses. Moderately soft, ductile, and malleable, this silvery metal rapidly displaces hydrogen from water and slowly reacts in air, developing a green oxide coating, which chips. For preservation, the metal must be sealed in a plastic covering or kept in mineral oil. Praseodymium was discovered in didymia, a mixture of several rare-earth oxides. From it, by repeated fractional crystallization of ammonium didymium nitrate, Carl Auer von Welsbach separated (1885) salts of the elements praseodymium (the green fraction) and neodymium. Praseodymium occurs in minerals such as monazite and bastnaesite and as one of the products of nuclear fission. Natural praseodymium is all stable isotope praseodymium-141. This element is commercially separated and purified by ion-exchange techniques; the reduction of the fluoride or chloride with calcium is one way in which the metal itself is prepared

Learn more about Pr with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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