the largest tarsal bone; forms the human heel
Latin calx = heel, hence the bone of the heel.
The bone in the foot that makes up the heel. The largest bone in the foot, it is the attachment site for numerous structures.
The "heel bone" of the foot, located at the back of the tarsus. image
The calcaneus is the large bone making up the heel of the human foot or the point of an animal's hock.