This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A bony growth on the fetlock, pastern, or coffin bone of a horse's foot, usually causing lameness.

n. osteoarthritis affecting any of several bones of a horse's foot

n. A morbid growth or deposit of bony matter between or on the small pastern and the great pastern bones.

n. In farriery, a bony callus or exostosis, the result of inflammation, on one or both pastern-bones of a horse, which sometimes extends to the interphalangeal joints and causes immobility and lameness.

n. The disease or disordered condition in horses which is caused by ring-bone: as, a horse affected by ring-bone and spavin.

"The periostitis has been overlooked; any chance that might have existed for preventing its advance to the chronic stage has been lost; the osseous formation is established; the ringbone is a fixed fact, and the indications are urgent and pressing."

false ring-bone   

vesication    diaphysis    osteoporosis    spavin    nephropathy    snow-blindness    seasickness    neurodegeneration    quittor    gastritis