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irrational number
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6 dictionary results for: Irrational number
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
irrational number
–noun Mathematics.
a number that cannot be exactly expressed as a ratio of two integers.
[Origin: 1545–55]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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American Heritage Dictionary - Cite This Source - Share This
irrational number  
n.   Any real number that cannot be expressed as a ratio between two integers.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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WordNet - Cite This Source - Share This
irrational number

noun
a real number that cannot be expressed as a rational number 

WordNet® 3.0, © 2006 by Princeton University.
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The American Heritage Science Dictionary - Cite This Source - Share This
irrational number       (ĭ-rāsh'ə-nəl)  Pronunciation Key 
A number that cannot be expressed as a ratio between two integers and is not an imaginary number. If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. Pi and the square root of 2 (√2) are irrational numbers.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
irrational number

A number that cannot be expressed as the ratio of two whole numbers.

Note: The square roots of most whole numbers are irrational numbers.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Free On-line Dictionary of Computing - Cite This Source - Share This

irrational number mathematics
A real number which is not a rational number, i.e. it is not the ratio of two integers.
The decimal expansion of an irrational is infinite but does not end in an infinite repeating sequence of digits.
Examples of irrational numbers are pi, e and the square root of two.
(1995-04-12)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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