trītūra, ae, f. [tero], a rubbing, wearing off, chafing. *
I In gen.: muli pectora copulae sparteae triturā continuā exulcerati, Ap. Met. 9, 13, 7.—
II In partic., a threshing , of grain, Varr. L. L. 5, § 21 Müll.; Verg. G. 1, 190; Col. 2, 19, 1; 1, 6, 23.