Merriam-Webster Collegiate Dictionary - triturate

 I. transitive verb  (-rated; -rating)  Etymology: Late Latin trituratus, past participle of triturare to thresh, from Latin tritura act of rubbing, threshing, from tritus, past participle — more at trite  Date: circa 1755  1. crush, grind  2. to pulverize and comminute thoroughly by rubbing or grinding  • triturable adjective  • triturator noun  II. noun  Date: circa 1891 a ~d substance ; trituration 2