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to·pha·ceous tə-'fā-shəs adj relating to, being, or characterized by the occurrence of tophi <\tophaceous deposits> <\tophaceous gout>
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to·pha·ceous (to-faґshəs) [L. tophaceus: tophus porous stone] hard or gritty; of the nature of or characterized by tophi.Medical dictionary. 2011.