from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A deposit of urates in the skin and tissue around a joint or in the external ear, occurring in gout. Also called chalkstone.
- n. A concretion of mineral salts and organic matter deposited on the surface of the teeth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A deposit of monosodium urate crystals in the body, caused by high levels of uric acid in the blood.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the mineral concretions about the joints, and in other situations, occurring chiefly in gouty persons. They consist usually of urate of sodium; when occurring in the internal organs they are also composed of phosphate of calcium.
- n. Calcareous tufa.
from The Century Dictionary and Cyclopedia
- n. Calc tufa.
- n. A concretion of calcareous matter which forms on the cartilaginous surface of the joints, and on the pinna of the ear, in gout; a gouty deposit.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout
- n. an incrustation that forms on the teeth and gums
Sometimes, if gout lasts for many years, uric acid crystals can collect in the joints or tendons, under the skin, or on the outside the ears, forming a whitish deposit called a tophus.
Et tophus fcaber, et nigris exefa chelydris Creta, negant alios seque ferpentibus agros Dulcem ferre cibum, et curvas praebere latebras.
4 Diab, Lexicon of orthopaedic etymology (1999), p.353 (see link): "NB: the spelling tophus perhaps was introduced into Latin as the more learned form, as though it were of Greek origin."
2 Skinner, The origin of medical terms (1961), 2nd edition, p.406 (see link): "Latin - tophus or tofus, from the Greek τόφος, a loose, porous, kind of stone (Hebrew, toph)."