Definitions for

**"Logarithmic"**The power to which a base, usually 10, must be raised to produce a given number. If nx = a, the logarithm of with as the base, is symbolically, log n a = x. For example, 103 = 1,000; therefore, log10 1,000 = 3. The kinds most often used are the common logarithm and the natural logarithm. 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 equiangular spiral.

A mathematical term for the ratio of values expressed by the base 10 or e. If the base is 10, the logarithm is called common. If the base is e, the logarithm is called natural.

Using logarithms; as, logarithmic graph paper; a logarithmic scale.

referring to the pH scale, that a one-unit increase or decrease in the scale represents a change by a factor of 10 in the acidity or basicity of a substance

Applied to measures that increase by 1 whenever the factor they depend on is multiplied by a certain number. For example, if a value increased from 10 to 100 to 1000, then a logarithmic measure of that value could increase, say, from 1 to 2 to 3.

Having a logarithm in one or more of the unknowns; -- of an equation.

A function that is a constant times the logarithm of its argument

of or relating to or using logarithms; "logarithmic function"

Of or pertaining to logarithms; consisting of logarithms.