mantissa
/mænˈtɪsə/noun
1
- Mathematics the part of a logarithm after the decimal point【数】尾数。
2
- Computing the part of a floating-point number which represents the significant digits of that number, and which is multiplied by the base raised to the exponent to give the actual value of the number【计算机】尾数。
词源
mid 17th cent.: from Latin， literally 'makeweight'， perhaps from Etruscan.