| calculus I | An abnormal concretion occurring within the animal body and usually composed of mineral salts. (18 Nov 1997) |
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| calculus II | <dentistry> A hard, yellowish to brownish black deposit or teeth formed largely through the mineralisation of dead bacteria in dental plaques by the calcium salts in salivary secretions and subgingival transudates. Synonym: tartar. (18 Nov 1997) |
| Calculus Surface Index | An index that measures only dental calculus, used for evaluating new calculus formation within a large group of test subjects. (05 Mar 2000) |
| pancreatic calculus | A concretion, usually multiple, in the pancreatic duct, associated with chronic pancreatitis. Synonym: pancreatolith, pancreolith. (05 Mar 2000) |
| gastric calculus | <zoology> See Crab's eyes, under Crab. Origin: Gastro- + -lith. Source: Websters Dictionary (01 Mar 1998) |
| mammary calculus | A concretion in one of the ducts of the breast. (05 Mar 2000) |
| Marginal Line Calculus Index | An index which scores supragingival calculus found in cervical areas paralleling marginal gingiva. (05 Mar 2000) |
| vesical calculus | A urinary calculus formed or retained in the bladder. Synonym: cystolith. (05 Mar 2000) |
| matrix calculus | A yellowish-white to light tan urinary calculus containing calcium salts, with the consistency of putty; composed chiefly of an organic matrix consisting of a mucoprotein and a sulfated mucopolysaccharide, and usually associated with chronic infection. (05 Mar 2000) |
| renal calculus | A calculus occurring within the kidney collecting system. Synonym: nephrolith. (05 Mar 2000) |
| cerebral calculus | A concretion in the brain or one of its ventricles. Synonym: cerebral calculus. Origin: encephalo-+ G. Lithos, stone (05 Mar 2000) |
| metabolic calculus | A stone, usually a renal stone, caused by a metabolic abnormality resulting in increased excretion of a substance of low solubility in urine, such as urate or cystine. (05 Mar 2000) |
| pharyngeal calculus | A concretion in the pharynx. Synonym: pharyngeal calculus. Origin: pharyngo-+ G. Lithos, stone (05 Mar 2000) |
| weddellite calculus | A calculus in which the crystalloid component consists of calcium oxalate dihydrate. (05 Mar 2000) |
| whewellite calculus | A calculus in which the crystalloid component consists of calcium oxalate monohydrate. (05 Mar 2000) |