Fr.: système métrique
A standard system of measurement using decimal units, in which the units of length, time, and mass are meter, second, and kilogram respectively.
râžmân-e šidsanjik, ~ nursanjik
Fr.: système photométrique
A system of → magnitudes, each of them characterized by a set of
well-defined → passbands
(or → filters) with known
→ response curves. The system is defined by the values given for
the → standard stars.