Definition/Meaning | Word/Phrase |
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number of which a given number is the logarithm | antilog , antilogarithm |

integer part (positive or negative) of the representation of a logarithm; in the expression log 643 | characteristic |

logarithm integer part | characteristic |

logarithm to the base 10 | common logarithm |

logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity | dB , decibel |

(psychophysics) the concept that the magnitude of a subjective sensation increases proportional to the logarithm of the stimulus intensity; based on early work by E. H. Weber | Fechner's law , Weber-Fechner law |

positive fractional part of the representation of a logarithm; in the expression log 643 | fixed-point part , mantissa |

logarithm decimal part | mantissa |

logarithm to the base e | Napierian logarithm , natural logarithm |

(from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic | pH , pH scale |

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