logarithmic

American  

[law-guh-rith-mik, -rith-, log-uh-] / ˌlɔ gəˈrɪð mɪk, -ˈrɪθ-, ˌlɒg ə- /

Also logarithmical

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 = log x.

   2. expressible by means of logarithms.

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logarithmic British  

/ ˌlɒɡəˈrɪðmɪk /

adjective

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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Other Word Forms

• logarithmically adverb

Etymology

Origin of logarithmic

First recorded in 1690–1700; logarithm + -ic

Example Sentences

These phenomena fall within the domain of logarithmic conformal field theories.

From Science Daily • Dec. 16, 2025

The scale for brightness is reverse logarithmic, which means the brighter an object is, the lower its magnitude number.

From Salon • Mar. 10, 2023

The scale’s objective, base-10 logarithmic system caught on, and although it’s been superseded, people still attach his name to the scale.

From Los Angeles Times • Mar. 7, 2023

But the February 6 earthquake was a 7.8—about four times bigger on the logarithmic scale of earthquake magnitudes.

From Scientific American • Feb. 22, 2023

Nat laid aside Moore, and spread the logarithmic tables he was making.

From "Carry On, Mr. Bowditch" by Jean Lee Latham