• 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

Related Words for logarithmic

numeral, numerical, arithmetic, binary, exponent, fraction, fractional, integral, mathematical, statistical, algebraic, algorithmic, arithmetical, differential, digital, exponential, logarithm, logarithmic, numerary, integrated

Examples from the Web for logarithmic

Historical Examples of logarithmic

  • 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