Calculuses

cal;cu;lus pronunciation: function: noun inflected form(s): plural cal;cu;li also cal;cu;lus;esetymology: latin, stone (used in reckoning)date: 1666 1 a : a method of computation or calculation in a special notation (as of logic or symbolic logic) b : the mathematical methods comprising differential and integral calculus —often used with the2 : calculation3 a : a concretion usually of mineral salts around organic material found especially in hollow organs or ducts b : 1tartar 24 : a system or arrangement of intricate or interrelated parts