logarithmic Definition

logarithm
noun

1. The power to which a real number, called the base (sense 9), must be raised in order to give another number or variable, eg the logarithm of 100 to the base 10 is 2 (written log10 100 = 2).

Derivative: logarithmic
adj

Derivative: logarithmically
adverb

Also called Napierian logarithm. See also antilogarithm.

Etymology: 1614: first coined by John Napier (1550‐1617), Scottish mathematician, from Greek logos word or ratio + arithmos number.