tritorium

tritorium [LL] 1 instrument for rubbing, grinding, or grating. ~ium, a pystel WW; a grater, ~ium Levins Manip. 74; a rubber, ~ium Ib. 75. 2 place where threshing is carried out, threshing floor. a1250 hospitium penkenyt est ~ium Leg. Wall. A 113; septem annis in ~io monasterii ‥ serviens mansit. ‥ sic diligenter exercebat trituratoris officium ut in paleario ~ii non posset granum quod culmum faceret inveniri (Endeus 25) VSH II 72.