Tophus

• POS: Noun
• HYPHEN: to=phus

CIDE DICTIONARY

Tophus, n. [NL.: cf. F. tophus a mineral concretion in the joint. See Toph.].

•  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.  [1913 Webster]
•  Calcareous tufa.  [1913 Webster]

OXFORD DICTIONARY

Tophus, n. (pl. tophi)
1 Med. a gouty deposit of crystalline uric acid and other substances at the surface of joints.
2 Geol. = TUFA.

Etymology

L, name of loose porous stones