calculus

1. (dated, countable) Calculation; computation.Synonyms: ciphering, reckoning, calculation, calculus, ciphering, computation, computing, reckoningcountabledated

2. (countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules.Examples: "lambda calculus"; "predicate calculus"countable

3. (uncountable, often definite, the calculus) Differential calculus and integral calculus considered as a single subject.Examples: "Near-synonyms: analysis, mathematical analysis"; "I took calculus in high school."Synonyms: infinitesimal calculusdefiniteoftenuncountable

4. (countable, medicine) A stony concretion that forms in a bodily organ.Examples: "Commonly indicated for treatment of sour crop (Fig. 11-11, A), an ingluviotomy is done to retrieve crop calculi, ingluvioliths, or foreign bodies (which are not accessible per os) or to retrieve proventricular or ventricular foreign bodies (using micromagnets [glued in place within plastic tubes], lavage, or endoscopy) and for the placement of an ingluviotomy or proventriculotomy tube or the collection of crop wall biopsies."Synonyms: stonecountable

5. (uncountable, dentistry) Deposits of calcium phosphate salts on teeth.Synonyms: dental calculus, tartaruncountable

6. (countable) A decision-making method, especially one appropriate for a specialised realm.Examples: "The Tory leader refused to state how many financiers he thought should end up in jail, saying: “There is not some simple calculus.""countable