Category:Tophus

To"phus, n.; pl. Tophi. Etym: [nl.: cf. F. tophus a mineral Concretion in the joint. See toph.] [written also tofus.]

1. (med.)

Defn: 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.)

Defn: calcareous tufa.