\Log`a*rith"mic\, Logarithmical \Log`a*rith"mic*al\,
a. [Cf. F. logarithmique.]
Of or pertaining to logarithms; consisting of logarithms.
{Logarithmic curve} (Math.), a curve which, referred to a
   system of rectangular co["o]rdinate 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}.