To"phus (?), n.; pl. Tophi (#). [NL.: cf. F. tophus a mineral concretion in the joint. See Toph.] [Written also tofus.]

1. Med.

One of the mineral concretions about the joints, and in other situations, occurring chiefly in gouty persons. They consist usually of urate of sodium; when occurring in the internal organs they are also composed of phosphate of calcium.

2. Min.

Calcareous tufa.

 

© Webster 1913.

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