Logarithmic

a.
  1. Of or pertaining to logarithms; consisting of logarithms.
  2. Using logarithms; as, logarithmic graph paper; a logarithmic scale.
  3. Having a logarithm in one or more of the unknowns; -- of an equation.
    4. Logarithmic curve (Math.),
    a curve which, referred to a system of rectangular coördinate 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.