DICT.TW Dictionary Taiwan

 To·fus n.
 1. Tophus.
 2. Min. Tufa. See under Tufa, and Toph.
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 To·phus n.; pl. Tophi    [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.
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