The Probert Encyclopaedia of General Information

HORSE

In carpentry, a horse is a wooden frame used as a work bench. There are various types of carpenter's horses including the saw-horse, a frame used for supporting timber while it is sawn and the shave-horse which is a frame with a clamp or vice used for holding timber while it is shaved with a plane or draw-knife.

In military terminology, a horse was a wooden frame with a sharp ridge formerly used in armies as a punishment for delinquent soldiers who were forced to sit upon it. Similar items are used today in SM sex games.
Research Horse