Noun
The decimal part of a logarithm, as distinguished from the integral part, or characteristic.
Source: Webster's dictionaryAn eight-bit Exponent Reqister contained the exponent for floating point operations (the mantissa was in AQ). Source: Internet
Each 64-bit MMX register corresponds to the mantissa part of an 80-bit x87 register. Source: Internet
For n bit floating-point numbers, with n-m bits in the mantissa and m bits in the exponent : : : Note that the dynamic range is much larger than fixed-point, but at a cost of a worse signal-to-noise ratio. Source: Internet
Precision is defined as the minimum difference between two successive mantissa representations; thus it is a function only in the mantissa; while the gap is defined as the difference between two successive numbers. Source: Internet
The mantissa was either 28 or 64 fits, twos-complement binary. Source: Internet