Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A bony growth on the surface of a bone or tooth.

from The Century Dictionary.

  • noun In pathology, a morbid bony growth on the surface of a bone, arising from bone, periosteum, or articular or epiphyseal cartilage.
  • noun In botany, the formation of woody, wart-like excrescences upon the stems or roots of plants.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Med.) Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone.
  • noun (Bot.) A knot formed upon or in the wood of trees by disease.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A benign bony growth, often covered with cartilage, on the surface of a bone or tooth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a benign outgrowth from a bone (usually covered with cartilage)

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek exostōsis : ex-, out of; see exo– + osteon, bone; see ost- in Indo-European roots + -ōsis, -osis.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From ex- + Ancient Greek ὀστέον (osteon, "bone").

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Examples

  • Ringbone is the designation of the exostosis which is found on the coronet and in the digital and phalangeal regions.

    Special Report on Diseases of the Horse Charles B. Michener 1877

  • Congenital deformity had given his face a crazed top-heaviness, for while he was so undershot that his upper gum hung in air, his forehead was so distended by exostosis that it all but hid his eyes.

    Starship Aldiss, Brian 1959

  • Lameness usually precedes the formation of exostosis, though cases are observed wherein an exostosis is present and no lameness is manifested and no history of the previous existence of lameness is available.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • It is a misnomer, in a sense, and the veterinarian is frequently obliged to spend considerable time with his clients in order to convince them that a spherodial exostosis of the proximal phalanx, in certain cases, is in reality "ringbone," even though there exists no exostosis which completely encircles the affected bone.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • In _articular_ ringbone as soon as there is developed an exostosis, it occupies a position on the dorsal (anterior) part of the articulation and extends around the sides of the joint.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • If situated rather high and extending anterior to the hock, there is less likelihood of recovery resulting than where an exostosis is confined to the lower row of tarsal bones.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • Later, unless an unusually large exostosis is formed, which may cause a constant irritation due to its size and juxtaposition to the carpus, lameness is discontinued.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • Periarticular ringbone may, because of the size and location of the exostosis, constitute a condition which cannot be relieved in any way in one case, and in another, because of the manner of distribution of such osseous deposits, the condition may be such that prompt recovery will follow proper treatment.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

  • Hallux valgus, if severe and associated with marked exostosis or bunion.

    EXECUTIVE ORDER 10001 1948

  • By observing the internal surface of the hock from various suitable angles, such as from between the forelegs or directly behind the subject, one may note the presence of any ordinary exostosis.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1 John Victor Lacroix

Comments

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  • Beware of high fashion's appeals

    And perils that lurk in high heels.

    The danger that's grossest

    Is dread exostosis

    That marketers' cunning conceals.

    December 23, 2016