natural number

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natural number

any of the numbers 0,1,2,3,4,… that can be used to count the members of a set; the nonnegative integers
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

natural number

[′nach·rəl ′nəm·bər]
(mathematics)
One of the integers 1, 2, 3, ….
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

natural number

(mathematics)
An integer greater than or equal to zero. A natural number is an isomorphism class of a finite set.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)