logarithmic

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


Origin:
1690–1700; logarithm + -ic

logarithmically, adverb
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World English Dictionary
logarithmic or logarithmical (ˌlɒɡəˈrɪðmɪk)
 
adj
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
 
logarithmical or logarithmical
 
adj
 
logarithmically or logarithmical
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
So all our prognoses should reckon with logarithmic plus acceleration in
  renewables availability, efficiency and falling prices.
Down close to the surface, the wind speed follows a logarithmic profile.
The first graph he designed was a bubble chart that had double logarithmic
  axes, with income on one axis and health on the other.
The logarithmic spiral echoes the curved arms of hurricanes and distant
  galaxies.
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