# logarithm

*logarithm*on Thesaurus.com

the exponent of the power to which a base number must be raised to equal a given number; log: 2 is the logarithm of 100 to the base 10 (2 = log10 100).

## Origin of logarithm

^{1}

## Words Nearby logarithm

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

## How to use logarithm in a sentence

In 1614 John Napier had invented logarithms, showing how multiplication could be accomplished by addition.

FiveThirtyEight’s urbanization index is calculated as the natural

*logarithm*of the average number of people living within a five-mile radius of a given resident.What Democrats Can Learn From Nebraska’s Shift To The Right | Ross Benes (rossbenes@gmail.com) | December 30, 2020 | FiveThirtyEightThis quantity is defined as the

*logarithm*of a matrix — an array of numbers.The Most Famous Paradox in Physics Nears Its End | George Musser | October 29, 2020 | Quanta MagazineThe new formula relies on the mathematical concept known as logarithms.

To figure out your dog’s ‘real’ age, you’ll need a calculator | Bethany Brookshire | August 12, 2020 | Science News For StudentsIf the characteristic of a

*logarithm*is negative, Oughtred indicates this fact by placing the - above the characteristic.William Oughtred | Florian Cajori

The

*logarithm*of the number is then obtained by adding the previously calculated logarithms of the factors.William Oughtred | Florian CajoriWhat is the probability that the fifth decimal of a

*logarithm*taken at random from a table is a '9'?We can calculate our

*logarithm*without recourse to the table, but we do not wish to give ourselves the trouble.In July, while at work on

*logarithm*tables, he was overtaken by a sudden fainting fit, evidently of an epileptic nature.Shandygaff | Christopher Morley

## British Dictionary definitions for logarithm

/ (ˈlɒɡəˌrɪðəm) /

the exponent indicating the power to which a fixed number, the base, must be raised to obtain a given number or variable. It is used esp to simplify multiplication and division: if a x = M, then the logarithm of M to the base a (written log a M) is x: Often shortened to: log See also common logarithm, natural logarithm

## Origin of logarithm

^{1}

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

## Scientific definitions for logarithm

[ lô′gə-rĭð′əm ]

The power to which a base must be raised to produce a given number. For example, if the base is 10, then the logarithm of 1,000 (written log 1,000 or log10 1,000) is 3 because 103 = 1,000. See more at common logarithm natural logarithm.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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