fixed point

Short definition from Wiktionary

Noun

1. 1
   A fractional-number representation with a fixed number of digits after the decimal point. Compare floating point and integer.
2. 2
   A value which is unchanged by a function or other mapping. Formally: a value x for which f(x)=x.

Adjective

1. 1
   Pertaining to fixed point representations or operations.
2. 2
   Being or using an internal number representation with a fixed number of decimal places (as opposed to floating-point).