There are several different joints in the back leg of the horse. The joint high up near the flank is called the stifle joint. Next will be the hock, the 'backward knee' half way down the leg. At the bottom right above the hoof is the ankle joint.
The snaffle is a type of bit. A similar word is stifle, which is a hind leg joint in the horse.
There are several, but the most commonly refered one is the Hock
The carpus on a horse is commonly referred to as the "knee," which is only on the front legs. The tarsus is the corresponding joint on the hind leg, commonly called the "hock."
The stifle is a joint in the hind leg that works much like a human knee. It's found at the front of the hind leg near the flank.
front and hind
The flank is the fleshy part where the hind leg meets the abdomen.
The hind quarters are upper back leg (thigh) or rump (butt).
A horse's hock is located on the back legs of the horse. It is the joint that would act as a knee for the horse and is the large joint located about half way up the horse's leg. Additional information: in comparative anatomy the hock joint is equivalent to a human ankle so it bends backward instead of forward. The stifle joint in a horse actually the same as a human knee joint.
It depends on wich part you are talking about. there are three. The feltlock, the pastern, and the ergot.
Viagra
It is the muscle on the upper part of a horses hind leg, above the hock.
It's called a hoof. It's at the end of each of its four legs, which is called a foot or hoof.