Water Mist : A water spray for which the Dv0. 99, for the flow-weighted cumulative volumetric distribution of water droplets, is less than 1000 microns at the minimum design operating pressure of the water mist nozzle
NFPA 750 Standard on Water Mist Fire Protection Systems, 2003 ed. https://www.nfpa.org/Assets/files/AboutTheCodes/75 0/750_FKT-AAA_SDAgenda_01-13.pdf, (Std: Wtr Mist Fr Prac Sys - Amer) {346 NFC}