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Natural logarithm

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natural logarithm

–noun Mathematics.
a logarithm having e as a base. Symbol: ln


Origin:
1810–20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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natural logarithm  
n.   Symbol ln
A logarithm in which the base is the irrational number e (= 2.71828 . . . ). For example, ln 10 = loge10 = approximately 2.30258. Also called Napierian logarithm.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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