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rational number

noun, Mathematics
a number that can be expressed exactly by a ratio of two integers.
Origin of rational number
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for rational-number

rational number

any real number of the form a/b, where a and b are integers and b is not zero, as 7 or 7/3
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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rational-number in Science
rational number  
A number that can be expressed as an integer or a quotient of integers. For example, 2, -5, and 1/2 are rational numbers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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