arthritic calculus

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Calculus — A stone, as in the urinary tract. Also, the calcium salt deposits on the teeth. The word calculus in Latin means a pebble. Pebbles were once used for counting, from which came the mathematical field of calculus. A urinary calculus is a pebble in… … Medical dictionary
Tophus — A nodular mass of uric acid crystals. Tophi are characteristically deposited in different soft tissue areas of the body in gout. The word tophus comes via Latin from the Greek tophos meaning a porous volcanic stone. In chronic (tophaceous) gout,… … Medical dictionary
Neanderthal — For other uses, see Neanderthal (disambiguation). Neanderthal Temporal range: Middle to Late Pleistocene 0.6–0.03 Ma … Wikipedia

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