ringbone

noun

ring·​bone ˈriŋ-ˌbōn 

: 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

Word History

First Known Use

14th century, in the meaning defined above

Medical Definition

ringbone

noun

ring·​bone -ˌbōn 

: 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