**Log`a*rith"mic** (?), **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 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.

© Webster 1913.