Definition of ringbone
: a bony outgrowth on or near the articulating surface of the pastern or coffin bone of a horse that typically results from injury and usually produces lameness
First Known Use of ringbone
Medical Definition of ringbone
: a bony outgrowth on the phalangeal bones of a horse's foot that usually produces lameness; also : osteoarthritis of a horse's foot that produces such an outgrowth
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