the GNU version of the Collaborative International Dictionary of English
adj. Gritty; sandy; rough; stony.
The Century Dictionary and Cyclopedia
Pertaining to a toph or tophus; gritty; sandy: as, a tophaceous concretion.
Word Usage
"With allopurinol it has been possible to prevent and reduce in the tophaceous deposits and to prevent urate stone formation (74), (81), (87), (89,90)."