Fetlocks are the joint between the cannon bone and the long pastern bone in the horse's leg, often referred to as the ankle. There are several synonyms which can be used to describe this part of the leg, including the ankle joint, the joint of the hind leg, or even the joint just above the hoof. Other synonyms for fetlocks may include the pastern joint, hock, tarsus, or the talus. Whatever the term used, fetlocks are an important part of a horse's anatomy, allowing for movement and flexibility in their legs as they run and jump. Understanding the various synonyms for this part of a horse's body can help when discussing equine anatomy or when communicating with other horse enthusiasts.