noun, plural tophi [toh-fahy] . Pathology.
a calcareous concretion formed in the soft tissue about a joint, in the pinna of the ear, etc., especially in gout; a gouty deposit.

1545–55; < Latin tōphus, tōfus tufa

tophaceous [tuh-fey-shuhs] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tophus (ˈtəʊfəs)
n , pl -phi
pathol Also called: chalkstone a deposit of sodium urate in the helix of the ear or surrounding a joint: a diagnostic of advanced or chronic gout
[C16: from Latin, variant of tōfustufa, tuff]

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American Heritage
Medical Dictionary

tophus to·phus (tō'fəs)
n. pl. to·phi (-fī)

  1. A deposit of urates in the skin and tissue around a joint or in the external ear.

  2. Dental calculus; tartar.

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