Rs'

R, r

[ahr]
noun, plural R's or Rs, r's or rs.
1.
the 18th letter of the English alphabet, a consonant.
2.
any spoken sound represented by the letter R or r, as in ran, carrot, or rhyme.
3.
something having the shape of R .
4.
a written or printed representation of the letter R or r.
5.
a device, as a printer's type, for reproducing the letter R or r.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
r  
Abbreviation of radius
R  
The symbol for resistance.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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