Logarithmic (?), Logarithmical (?), a. [Cf. F. logarithmique.]
1. Of or pertaining to logarithms; consisting of logarithms.
[1913 Webster]
2. Using logarithms; as, “logarithmic graph paper; a logarithmic scale”.
[PJC]
3. Having a logarithm in one or more of the unknowns; -- of an equation.
[PJC]
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.
[1913 Webster]