logarithm: Meaning and Definition of

log•a•rithm

Pronunciation: (lô'gu-ri"um, -rith"-, log'u-), [key]
— n. Math.
  1. the exponent of the power to which a base number must be raised to equal a given number; log: 2 is the logarithm of 100 to the base 10 (2 = log10 100).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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