# logarithm

[law-guh-rith-uh m, -rith-, log-uh-]

- 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).

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## Origin of logarithm^{}

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for logarithm

### Historical Examples

#### That was short for logarithm, you know, because I was such a log at arithmetic.

Adam Johnstone's SonF. Marion Crawford

#### The complement of the logarithm of a sine, tangent, or secant.

The Sailor's Word-BookWilliam Henry Smyth

#### It seems that gravitation is not truth, but only the logarithm of it.

A Budget of Paradoxes, Volume I (of II)Augustus De Morgan

#### To find the logarithm of 2, Briggs raised it to the tenth power, viz.

#### For example, suppose the logarithm of 543839 required to twelve places.

# logarithm

- 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 xOften shortened to: log See also common logarithm, natural logarithm

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## Word Origin

C17: from New Latin logarithmus, coined 1614 by John Napier, from Greek logos ratio, reckoning + arithmos number

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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## Word Origin and History for logarithm

### n.

1610s, Modern Latin logarithmus, coined by Scottish mathematician John Napier (1550-1617), literally "ratio-number," from Greek logos "proportion, ratio, word" (see logos) + arithmos "number" (see arithmetic).

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Online Etymology Dictionary, © 2010 Douglas Harper

# 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.

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The American Heritage® Science Dictionary
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