Log·a·rith·mic Log·a·rith·mic·al a.
1. Of or pertaining to logarithms; consisting of logarithms.
Logarithmic curve Math., a curve which, referred to a system of rectangular coordinate axes, is such that the ordinate of any point will be the logarithm of its abscissa.
Logarithmic spiral, a spiral curve such that radii drawn from its pole or eye at equal angles with each other are in continual proportion. See Spiral.
adj : of or relating to or using logarithms; "logarithmic