floating-point number

名词noun

1. 1A number written in the form a × bc, e.g. 3.75 × 103 (a being the mantissa, b, the base and c, the exponent).
2. 2(computing) A real number held as a pair of integers, one representing the mantissa and the other representing the exponent. The base is normally 10, 16 or 256 depending on the computing system.