Logarithm

# Logarithm

WordNet

### noun

(1)   The exponent required to produce a given number
Wiktonary

### Etymology

From , term coined by Scot mathematician John Napier from and .

### Noun

1. For a number $x$, the power to which a given base number must be raised in order to obtain $x$. Written $\log_b x$. For example, $\log_\left\{10\right\} 1000 = 3$ because $10^3 = 1000$.