# milli (m)

Milli (m) is the prefix for one-thousandth. In decimal notation it is zero with 3 digits behind the decimal point: 0.001, in exponential notation it is: `10^-3`.

The prefix milli is defined in the SystÃ¨me International( SI) as well as all other mathematical prefixes. It is used in electronics for specifying the size of inductances or for current and voltage specifications, but also in communications engineering for specifying the wavelength of microwaves.