micronize

micronise

verb (tr)

to reduce (a material) to a very fine powder, esp to particles only a few microns in diameter

Derived Formsmicronization or micronisation, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012