Main Entry:

log·a·rithm

Pronunciation:

\ˈlȯ-gə-ˌri-thəm, ˈlä-\

Function:

noun

Etymology:

New Latin logarithmus, from log- + Greek arithmos number — more at arithmetic

Date:

circa 1616

: the exponent that indicates the power to which a base number is raised to produce a given number <the logarithm of 100 to the base 10 is 2>

— log·a·rith·mic \ˌlȯ-gə-ˈrith-mik, ˌlä-\ adjective

— log·a·rith·mi·cal·ly \-mi-k(ə-)lē\ adverb