• synonyms


[law-guh-rith-mik, -rith-, log-uh-]
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adjective Mathematics.
  1. pertaining to a logarithm or logarithms.
  2. (of an equation) having a logarithm as one or more of its unknowns.
  3. (of a function)
    1. pertaining to the function y = logx.
    2. expressible by means of logarithms.
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Also log·a·rith·mi·cal.

Origin of logarithmic

First recorded in 1690–1700; logarithm + -ic
Related formslog·a·rith·mi·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for logarithmic

Historical Examples

  • The common snail-shell is constructed according to logarithmic laws.

    Insect Adventures

    J. Henri Fabre

  • By this characteristic we recognize the ‘logarithmic spiral.’

  • Should logarithmic tables be withheld from him until the theoretical foundation is laid in the mind of the pupil?

    William Oughtred

    Florian Cajori

  • Sixty seconds later the Brainchild began her long, logarithmic drop toward the surface of Eisberg.

    Unwise Child

    Gordon Randall Garrett

  • Such tables can scarcely be said to come under the head of logarithmic tables.

British Dictionary definitions for logarithmic



  1. of, relating to, using, or containing logarithms of a number or variable
  2. consisting of, relating to, or using points or lines whose distances from a fixed point or line are proportional to the logarithms of numbers
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Abbreviation: log
Derived Formslogarithmically, adverb
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

Word Origin and History for logarithmic


1690s, from logarithm + -ic. Related: Logarithmical (1630s).

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Online Etymology Dictionary, © 2010 Douglas Harper