pl. -·li· or -·luses
- any abnormal stony mass or deposit formed in the body, as in a kidney or gallbladder or on teeth
- any system of calculation using special symbolic notations
- infinitesimal calculus
- any method or system of calculating, reasoning, or evaluating
Origin of calculusL: see calculate
nounpl. cal·cu·li or cal·cu·lus·es
- Medicine An abnormal concretion in the body, usually formed of mineral salts and found in the gallbladder, kidney, or urinary bladder, for example.
- Dentistry See tartar.
- Mathematics a. The branch of mathematics that deals with limits and the differentiation and integration of functions of one or more variables.b. A method of analysis or calculation using a special symbolic notation.c. The combined mathematics of differential calculus and integral calculus.
- A system or method of calculation: “[a] dazzling grasp of the nation's byzantine budget calculus” (David M. Alpern).
Origin of calculusLatin, small stone used in reckoning; see calculate.
(countable and uncountable, plural calculi or calculuses)
- (dated, countable) calculation, computation
- (countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules.
- lambda calculus
- predicate calculus
- (uncountable, often definite, the calculus) Differential calculus and integral calculus considered as a single subject; analysis.
- (countable, medicine) A stony concretion that forms in a bodily organ.
- renal calculus (= kidney stone)
- (uncountable, dentistry) Deposits of calcium phosphate salts on teeth.
- (countable) A decision-making method, especially one appropriate for a specialised realm.