Mantissa definition

măn-tĭsə
The decimal part of a logarithm to base 10 as distinguished from the integral part (called the characteristic)

.7193 is the mantissa of the logarithm 4.7193

noun
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The decimal part of a logarithm. In the logarithm 2.95424, the mantissa is 0.95424.
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The definition of a mantissa is the part of a number located after a decimal point.

An example of mantissa is 234 in the number 1101.234.

noun
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(mathematics) The part of a common logarithm after the decimal point, the fractional part of a logarithm.
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(mathematics, computing, proscribed) The significand; that part of a floating-point number or number in scientific notation that contains its significant digits.
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The part of a logarithm to the base ten that is to the right of the decimal point. For example, if 2.749 is a logarithm, .749 is the mantissa.
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Other Word Forms

Noun

Singular:
mantissa
Plural:
mantissae

Origin of mantissa

  • Latin makeweight perhaps of Etruscan origin

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin mantissa, mantīsa, of unknown origin (said by Festus to be a loanword from Etruscan, but it may actually be from Celtic, possibly through Etruscan mediation).

    From Wiktionary

Mantissa Sentence Examples

  • The logarithms to base io of the first twelve numbers to 7 places of decimals are log 1 =0.0000000 log 5 log 2 = 0.3010300 log 6 log 3 =0.477 121 3 log 7 log 4 =0.6020600 log 8 The meaning of these results is that The integral part of a logarithm is called the index or characteristic, and the fractional part the mantissa.

  • The whole-number part of a logarithm is called the characteristic; the fractional part is called the mantissa.

  • The first to publish a general collection of treaties was Leibnitz, whose Codex juris gentium, containing documents from 1097 to 5497, " ea quae sola inter liberos populos legum sunt loco " appeared in 1693, and was followed in 1700 by the Mantissa.

  • For floating point types, digits is the number of radix digits in the mantissa.

  • When the base is to, the logarithms of all numbers in which the digits are the same, no matter where the decimal point may be, have the same mantissa; thus, for example, log 2.5613 =0-4084604, log 25.613 =1.4084604, log 2561300 = 6.4084604, &c.

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