Calculus definitions

kăl'kyə-ləs
An abnormal concretion in the body, usually formed of mineral salts and found in the gallbladder, kidney, or urinary bladder, for example.
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Any abnormal stony mass or deposit formed in the body, as in a kidney or gallbladder or on teeth.
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A system or method of calculation.
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Any method or system of calculating, reasoning, or evaluating.
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The branch of mathematics that deals with limits and the differentiation and integration of functions of one or more variables.
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A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body. Calculi are most commonly found in the gallbladder, kidney, or urinary bladder.
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An abnormal concretion in the body, usually formed of mineral salts and found in the gallbladder, kidney, or urinary bladder, for example.
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(dated, countable) Calculation, computation.
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(countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules.

Lambda calculus.

Predicate calculus.

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The branch of mathematics that deals with limits and the differentiation and integration of functions of one or more variables.
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A method of analysis or calculation using a special symbolic notation.
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The combined mathematics of differential calculus and integral calculus.
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Any system of calculation using special symbolic notations.
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(uncountable, often definite, the calculus) Differential calculus and integral calculus considered as a single subject; analysis.
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(countable, medicine) A stony concretion that forms in a bodily organ.

Renal calculus (= kidney stone)

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(uncountable, dentistry) Deposits of calcium phosphate salts on teeth.
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(countable) A decision-making method, especially one appropriate for a specialised realm.
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Origin of calculus

Latin calculus (“a pebble or stone used for counting”), diminutive of calx (“limestone”) + -ulus.