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# natural logarithm

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noun Mathematics.

a logarithm having e as a base. Symbol: ln

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Also called Napierian logarithm.

Compare common logarithm.

## Origin of natural logarithm

First recorded in 1810â€“20

## Words nearby natural logarithm

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, Â© Random House, Inc. 2023

## How to use natural logarithm in a sentence

We can see this in FiveThirtyEightâ€™s urbanization index, which captures how urban or rural an area is by calculating the natural logarithm of the average number of people living within a five-mile radius of another resident.

What Democrats Can Learn From Nebraskaâ€™s Shift To The Right|Ross Benes (rossbenes@gmail.com)|December 30, 2020|FiveThirtyEightTo figure out a dogâ€™s biological age, they say, multiply the natural logarithm of the dogâ€™s age in years by 16.

To figure out your dogâ€™s â€˜realâ€™ age, youâ€™ll need a calculator|Bethany Brookshire|August 12, 2020|Science News For Students

## British Dictionary definitions for natural logarithm

natural logarithm

noun

a logarithm to the base e. Usually written log e or lnAlso called: Napierian logarithm Compare e (def. 1), common logarithm

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Â© William Collins Sons & Co. Ltd. 1979, 1986 Â© HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for natural logarithm

natural logarithm

A logarithm using base e. Natural logarithms are common in mathematics, especially in cases involving complex numbers. They are also called Napierian logarithms, after their inventor, English mathematician John Napier (1550-1617). See more at e. Compare common logarithm.

The American HeritageÂ® Science Dictionary
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