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[noo-muh-rey-ter, nyoo-] /ˈnu məˌreɪ tər, ˈnyu-/
Arithmetic. the term of a fraction, usually above the line, that indicates the number of equal parts that are to be added together; the dividend placed over a divisor:
The numerator of the fraction 2/3 is 2.
Compare denominator (def 1).
a person or thing that numbers.
Origin of numerator
1535-45; < Late Latin numerātor a counter, numberer, equivalent to Latin numerā(re) to number + -tor -tor Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for numerator


(maths) the dividend of a fraction: the numerator of 7/8 is 7 Compare denominator
a person or thing that numbers; enumerator
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 numerator

1540s, from Late Latin numerator "counter, numberer," agent noun from numerat-, past participle stem of numerare "to count, number," from numerus "a number" (see number (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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numerator in Science
A number written above or to the left of the line in a common fraction to indicate the number of parts of the whole. For example, 2 is the numerator in the fraction 2/7 .
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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numerator in Culture

numerator definition

In mathematics, the number that appears on the top of a fraction. In the fraction 2/3, the numerator is 2. (Compare denominator.)

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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