s]
, -lus⋅es. | 1. | Mathematics. a method of calculation, esp. one of several highly systematic methods of treating problems by a special system of algebraic notations, as differential or integral calculus. |
| 2. | Pathology. a stone, or concretion, formed in the gallbladder, kidneys, or other parts of the body. |
| 3. | Also called tartar. Dentistry. a hard, yellowish to brownish-black deposit on teeth formed largely through the mineralization of dead bacteria in dental plaques by the calcium salts in salivary secretions and subgingival transudates. |
| 4. | calculation; estimation or computation: the calculus of political appeal. |

cal·cu·lus (kāl'kyə-ləs) n. pl. cal·cu·li (-lī') or cal·cu·lus·es
[Latin, small stone used in reckoning; see calculate.] |
calculus cal·cu·lus (kāl'kyə-ləs)
n. pl. cal·cu·lus·es or cal·cu·li (-lī')
An abnormal concretion in the body, usually formed of mineral salts and most commonly found in the gallbladder, kidney, or urinary bladder. Also called stone.
Dental tartar.
| calculus (kāl'kyə-ləs) Pronunciation Key
Plural calculi (kāl'kyə-lī') or calculuses
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