1. the positive fractional part of the representation of a logarithm; in the expression log 643 = 2.808 the mantissa is .808; [syn: mantissa, fixed-point part]
WordNet (r) 3.0 (2006):
fixed-point part
n 1: the positive fractional part of the representation of a
logarithm; in the expression log 643 = 2.808 the mantissa
is .808 [syn: mantissa, fixed-point part]