# Mantissa meaning

măn-tĭs'ə
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
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
(mathematics, computing, proscribed) The significand; that part of a floating-point number or number in scientific notation that contains its significant digits.
noun
The numeric value in a floating point number. See floating point.
(mathematics) The part of a common logarithm after the decimal point, the fractional part of a logarithm.
noun
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The decimal part of a logarithm. In the logarithm 2.95424, the mantissa is 0.95424.
noun
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.

### Origin of mantissa

• Latin makeweight perhaps of Etruscan origin
##### From American Heritage Dictionary of the English Language, 5th Edition
• From Latin mantissa, mantÄ«sa, of unknown origin (said by Festus to be a loanword from Etruscan, but it may actually be from Celtic, possibly through Etruscan mediation).