# logarithm

(redirected from Napier's logarithm)
Also found in: Thesaurus, Medical, Encyclopedia.

## log·a·rithm

(lô′gə-rĭth′əm, lŏg′ə-)
n. Mathematics
The power to which a base, such as 10, must be raised to produce a given number. If nx = a, the logarithm of a, with n as the base, is x; symbolically, logn a = x. For example, 103 = 1,000; therefore, log10 1,000 = 3. The kinds most often used are the common logarithm (base 10), the natural logarithm (base e), and the binary logarithm (base 2).

[New Latin logarithmus : Greek logos, reason, proportion; see leg- in Indo-European roots + Greek arithmos, number; see ar- in Indo-European roots.]

## logarithm

(ˈlɒɡəˌrɪðəm)
n
(Mathematics) 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 ax = M, then the logarithm of M to the base a (written logaM) is x. Often shortened to: log See also common logarithm, natural logarithm
[C17: from New Latin logarithmus, coined 1614 by John Napier, from Greek logos ratio, reckoning + arithmos number]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## log•a•rithm

(ˈlɔ gəˌrɪð əm, -ˌrɪθ-, ˈlɒg ə-)

n.
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).
[1605–15; < New Latin logarithmus < Greek log- log- + arithmós number; see arithmetic]

## log·a·rithm

(lô′gə-rĭth′əm)
The power to which a base must be raised to produce a given number. For example, if the base is 10, then 3 is the logarithm of 1,000 (written log 1,000 = 3) because 103 = 1,000.

## logarithm

- From Greek logos, "reckoning, ratio," and arithmos, "number."
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 logarithm - the exponent required to produce a given numberlogexponent, index, power - a mathematical notation indicating the number of times a quantity is multiplied by itselfcommon logarithm - a logarithm to the base 10Napierian logarithm, natural logarithm - a logarithm to the base e
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
لوغاريثْم
logaritmus
logaritme
logaritmi
logaritam
logaritmus
lógaritmi
logaritmas
logaritms
logaritmus
logaritm
ลอการิทึม

## logarithm

[ˈlɒgərɪθəm] N
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

## logarithm

[ˈlɒgərɪðəm] nlog book n
(formerly) (= registration document) [car] → carte grise
[traveller, explorer] → carnet m de route; [lorry driver] → carnet m de route
[movement of goods] → log cabin nlog fire n
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

## logarithm

nLogarithmus m
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

## logarithm

[ˈlɒgəˌrɪðm] nlogaritmo
common logarithm →
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

## logarithm

(ˈlogəriðəm) noun
(abbreviated to log (log) ) the number of times eg 10 must be multiplied by itself to produce a particular number. 10  10  10 or 103 = 1,000, so 3 is here the logarithm of 1,000.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in periodicals archive ?
Anyone who is of my generation, and I believe the lady with the Italian first name qualifies for this, will have marvelled at Mr Napier's logarithm tables.
Napier's logarithm was not defined in terms of exponents as our logarithm is today.
Even more astonishing, is the work of Kepler--no calculators, no slide rules, but he did have Napier's logarithms; a revolution in calculation at the time and one which is still so vital to the workings of our calculators.

Site: Follow: Share:
Open / Close