Definition of "calculus" in English

noun

1. (dated, countable) Calculation; computation.

2. (countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules.

   • lambda calculus
   • predicate calculus

3. (uncountable, often definite, the calculus) Differential calculus and integral calculus considered as a single subject.

   • Near-synonyms: analysis, mathematical analysis
   • I took calculus in high school.

4. (countable, medicine) A stony concretion that forms in a bodily organ.

5. (uncountable, dentistry) Deposits of calcium phosphate salts on teeth.

6. (countable) A decision-making method, especially one appropriate for a specialised realm.