Meaning

• Calculation; computation.

• Any formal system in which symbolic expressions are manipulated according to fixed rules.

  "lambda calculus"

• (often definite, the calculus) Differential calculus and integral calculus considered as a single subject; analysis.

• A stony concretion that forms in a bodily organ.

  "renal calculus ( = kidney stone)"

• Deposits of calcium phosphate salts on teeth.

• A decision-making method, especially one appropriate for a specialised realm.