mantissa

名词 mantissa:

1. the positive fractional part of the representation of a logarithm; in the expression log 643 = 2.808 the mantissa is .808
   同义词：fixed-point part

man.tis.sa

n.Mathematics （名词）【数学】
The decimal part of a logarithm. In the logarithm 2.95424, the mantissa is 0.95424.
尾数：对数的小数部分。如在对数2.95424中，尾数是0.95424

来源：
Latin [makeweight]
拉丁语 [充数物]
perhaps of Etruscan origin
可能来自于伊特鲁里亚语源