a. [ad. L. tōf-, tōphāce-us, f. TOPHUS: see -ACEOUS.]

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  1.  Of the nature of tophus or toph; sandy, gritty; rough, stony.

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1672.  Phil. Trans., VII. 4064. It is scabrous or rough, sand-like, although the substance is Tophaceous.

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1692.  Ray, Disc., II. iv. (1732), 128. The Topbaceous Hills and Cliffs about Andria in Apulia.

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1749.  Phil. Trans., XLVI. 221. The Waters of these hot Springs … are so replete with tophaceous Matter, that where ever they run, Masses of Tophus are formed.

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1777.  Lightfoot, Flora Scot., II. 535. Chara. Incrusted with a kind of tophaceous coat, which is like sand between the teeth.

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1819.  H. Busk, Vestriad, IV. 698. Sapphire brooks on beds tophaceous play.

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  2.  Path. Gritty or calcareous, as the matter deposited in gout.

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1687.  Phil. Trans., XVI. 553. The Generation of the Tophaceous Matter in the nodose Gout. Ibid. (1728), XXXV. 493. That tophaceous gouty Substance commonly found about the Joints.

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1879.  St. George’s Hosp. Rep., IX. 643. Gouty, or so called tophaceous, deposits.

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