Tophus
Pronunciation : To"phus
Part of Speech : n.;
Etymology : [NL.: cf. F. tophus a mineral concretion in the joint. See Toph.] [Written also tofus.]
Definition : 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.
pl. Tophi.
Source : Webster's Unabridged Dictionary, 1913