| renal calculus | A calculus occurring within the kidney collecting system. Synonym: nephrolith. (05 Mar 2000) |
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| 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) |
| mulberry calculus | A hard smooth urinary calculus composed of calcium oxalate, so-called because of its resemblance to a mulberry. (05 Mar 2000) |
| pleural calculus | A concretion in the pleural cavity. Synonym: pleural calculus. Origin: pleuro-+ G. Lithos, stone (05 Mar 2000) |
| pocketed calculus | A urinary calculus enclosed in a sac developed from the wall of the bladder. Synonym: pocketed calculus. (05 Mar 2000) |
| coral calculus | A calculus occurring in the renal pelvis, with branches extending into the infundibula and calices. Synonym: branched calculus, coral calculus, dendritic calculus. (05 Mar 2000) |
| haematogenetic calculus | A greenish or dark brown calcareous deposit on the tooth, usually apical to the gingival margin. Synonym: haematogenetic calculus. Synonym: subgingival calculus. (05 Mar 2000) |
| cystine calculus | A calculus composed of cystine, soft and faintly radiopaque. (05 Mar 2000) |
| preputial calculus | A calculus occurring beneath the foreskin. Synonym: postholith. (05 Mar 2000) |
| primary renal calculus | A calculus formed in an apparently healthy urinary tract, usually composed of oxalates, urates, or cystine. (05 Mar 2000) |
| salivary calculus | A calculus in a salivary duct or gland. Synonym: supragingival calculus. (05 Mar 2000) |