[lev.i.gate] vt -gat.ed ; -gat.ing [L levigatus, pp. of levigare to make smooth, fr. levis smooth (akin to Gk leios smooth and perh. to L linere to smear) + -igare (akin to agere to drive)--more at lime, agent] (1612) 1: polish, smooth
2. a: to grind to a fine smooth powder while in moist condition b: to separate (fine powder) from coarser material by suspending in a liquid -- lev.i.ga.tion n