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Noun: calculus (calculi)  kal-kyu-lus
  1. A hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
    "renal calculi can be very painful";
    - concretion
     
  2. An incrustation that forms on the teeth and gums
    - tartar, tophus
     
  3. (mathematics) the branch of mathematics that is concerned with limits and with the differentiation and integration of functions
    - infinitesimal calculus

Derived forms: calculi

Type of: crust, encrustation, incrustation, pure mathematics, rock, stone

Encyclopedia: Calculus, Cuthbert