IPA: /ˈrɪŋboʊn/
KK: /ˈrɪŋboʊn/
A bony growth that forms on or near the joint area of a horse's leg, often due to injury, and can cause lameness.
The veterinarian diagnosed the horse with ringbone after noticing the bony growth on its leg.
Ringbone → The word is formed from "ring" (from Old English "hring", meaning a circular band) and "bone" (from Old English "ban", meaning the hard structure that forms the skeleton). The term "ringbone" refers to a bony growth that forms in a ring shape around a bone, typically in horses.
Think of a 'circular band' ('ring') around a 'hard structure' ('bone') — that's what a ringbone is, a bony growth that forms in a ring shape.