The word "callus" has several meanings: 1) A callus or callosity is a localized firm thickening of the upper layer of skin as a result of repetitive friction. A callus on the skin of the foot has become thick and hard from rubbing (as a result of repetitive friction). Calluses of the feet may lead to other problems such as serious infections. Shoes that fit well can keep calluses from forming on the feet. (2) A callus is also the word applied to hard new bone substance that forms in an area of bone fracture. It is part of the bone repair process.
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1. SYN: callosity. 2. A composite mass of tissue that forms at a fracture site to establish continuity between the bone ends; it is composed initially of uncallused fibrous tissue and cartilage, and ultimately of bone. [L. hard skin]
- central c. the c. within the medullary cavity of a fractured bone. SYN: medullary c..
- definitive c. the c. which has become converted into osseous tissue. SYN: permanent c..
- ensheathing c. the mass of c. around the outside of the fractured bone.
- medullary c. SYN: central c..
- permanent c. SYN: definitive c..
- provisional c. the c. that develops to keep the ends of the fractured bone in apposition; it is absorbed after union is complete. SYN: temporary c..
- temporary c. SYN: provisional c..

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cal·lus 'kal-əs n
1) a thickening of or a hard thickened area on skin
2) a mass of exudate and connective tissue that forms around a break in a bone and is converted into bone in the healing of the break

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1. the composite mass of tissue that forms between bone ends when a fracture is healing. It initially consists of blood clot and granulation tissue, which develops into cartilage and then calcifies to form bone. Callus formation is an essential part of the process of healthy union in a fractured bone.

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cal·lus (kalґəs) [L.] 1. localized hyperplasia of the stratum corneum due to pressure or friction. Called also callosity, keratoma, and tyloma. See also hyperkeratosis (def. 1) and keratoderma. 2. an unorganized meshwork of woven bone developed on the pattern of the original fibrin clot, which is formed following fracture of a bone and is normally ultimately replaced by hard adult bone; called also bony c. 3. a mass of plant tissue formed over a wound or at the base of a cutting.

Calluses on the sole of the foot.

Medical dictionary. 2011.

Look at other dictionaries:

  • Callús — Saltar a navegación, búsqueda Callús Bandera …   Wikipedia Español

  • Callús — Vue générale …   Wikipédia en Français

  • Callus — oder Kallus (lat. für ‚harte Haut‘ oder ‚Schwiele‘, fachlich eine Ansammlung undifferenzierter oder nicht vollständig differenzierter Zellen) nennt man: bei Tieren und beim Menschen Starkwuchs an den Bruchstellen von Knochenbrüchen, siehe Kallus… …   Deutsch Wikipedia

  • CALLUS — item nucleus, de margaritis, apud Plin. l. 9. c. 35. Sani quidem partus multiplici constant cute, non improprie Callum ut existimuri corporis possit. Et paulo post, Multô deinde obrutas sule in vasis sictilibus, erosa carne omni, nucleos quosdam… …   Hofmann J. Lexicon universale

  • callus — (n.) hardened skin, 1560s, from L. callus, variant of callum hard skin, related to callere be hard, and cognate with Skt. kalika bud, O.Ir. calath hard, O.C.S. kaliti to cool, harden …   Etymology dictionary

  • callus — [kal′əs] n. pl. calluses [L, var. of callum, hard skin] 1. a hardened, thickened place on the skin 2. the hard substance that forms at the break in a fractured bone and serves to reunite the parts 3. a disorganized mass of cells that develops… …   English World dictionary

  • Callus — Cal lus (k[a^]l l[u^]s), n. [L. See {Callous}.] 1. (Med.) (a) Same as {Callosity}. (b) The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistence, but is… …   The Collaborative International Dictionary of English

  • callus — callus. См. каллюс. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Callus — (lat.), 1) Schwiele der Haut durch anhaltenden Druck an den Füßen, Händen etc., bei harter Handarbeit, vielem Barfußengehen entstandene Verdickung der Haut; 2) gleiche gutartige Verhärtung der Haut, in häutigen u. anderen weichen Gebilden, bes.… …   Pierer's Universal-Lexikon

  • Callus — (lat., »Schwiele«), die sich neu bildende Knochenmasse, durch welche die Heilung von Knochenbrüchen (s.d.) bewirkt wird. Callös nennt man auch ein als Abschluß von Entzündungsprozessen entstehendes derbes, sehniges, narbiges Gewebe. – In der… …   Meyers Großes Konversations-Lexikon

  • Callus — (lat.), Schwiele, Knorpel; das neu gebildete Knochengewebe bei Knochenbrüchen; wulstige Wucherungen an Pflanzen zum Abschluß von Wunden …   Kleines Konversations-Lexikon

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