tophus

to·phus  (tfs)

n. pl. to·phi (-f)

1. A deposit of urates in the skin and tissue around a joint or in the external ear, occurring in gout. Also called chalkstone.

2. A concretion of mineral salts and organic matter deposited on the surface of the teeth.

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[Latin tphus, tufa.]

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tophus [ˈtəʊfəs]

n pl -phi [-faɪ]

(Medicine / Pathology) Pathol a deposit of sodium urate in the helix of the ear or surrounding a joint: a diagnostic of advanced or chronic gout Also called chalkstone

[from Latin, variant of tōfus tufa, tuff]

tophaceous  [təʊˈfeɪʃəs] adj

Thesaurus

Noun	1.	tophus - a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout chalkstone urate - a salt of uric acid
	2.	tophus - an incrustation that forms on the teeth and gums calculus, tartar crust, encrustation, incrustation - a hard outer layer that covers something