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[dih-vahy-zer] /dɪˈvaɪ zər/
noun, Mathematics
a number by which another number, the dividend, is divided.
a number contained in another given number a certain integral number of times, without a remainder.
Origin of divisor
late Middle English
1425-75; late Middle English < Latin dīvīsor, one who divides, equivalent to dīvīd- (variant stem of dīvidere to divide) + -tor -tor Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for divisor


a number or quantity to be divided into another number or quantity (the dividend)
a number that is a factor of another number
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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Word Origin and History for divisor

early 15c., Latin agent noun from dividere (see divide (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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divisor in Science
A number used to divide another. In the equation 15 ÷ 3 = 5, 3 is the divisor.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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divisor in Technology

A quantity that evenly divides another quantity.
Unless otherwise stated, use of this term implies that the quantities involved are integers. (For non-integers, the more general term factor may be more appropriate.)
Example: 3 is a divisor of 15. Example: 3 is not a divisor of 14.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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