Logarithm
['lɒgərɪð(ə)m;-rɪθ-] or ['lɔɡərɪðəm]
Definition
(n.) One of a class of auxiliary numbers, devised by John Napier, of Merchiston, Scotland (1550-1617), to abridge arithmetical calculations, by the use of addition and subtraction in place of multiplication and division.
Checked by Alyson
Definition
n. (of a number) the power to which another given number must be raised in order that it may equal the former number: one of a series of numbers having a certain relation to the series of natural numbers by means of which many arithmetical operations are simplified.—adjs. Logarith′mic -al pertaining to or consisting of logarithms.—adv. Logarith′mically.
Checker: Rupert