Rational numbers

rational number

noun Mathematics.
a number that can be expressed exactly by a ratio of two integers.

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Rational numbers is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
American Heritage
Science Dictionary
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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