CALCULUS
none. (plural. -luses or -li) 1 particular method of mathematical calculation or reasoning. 2 stone or mineral mass in the body. [latin, = small stone (used on an abacus)]
none. (plural. -luses or -li) 1 particular method of mathematical calculation or reasoning. 2 stone or mineral mass in the body. [latin, = small stone (used on an abacus)]