Definitions for "Quoin"
Originally, a solid exterior angle, as of a building; now, commonly, one of the selected pieces of material by which the corner is marked.
A wedgelike piece of stone, wood, metal, or other material, used for various purposes;
To support and steady a stone.
To support the breech of a cannon.
To wedge or lock up a form within a chase.
expandable metal or wooden wedge used by printers to lock up a form within a chase
Keywords:  keystone, arch
the keystone of an arch
Keywords:  casks, rolling, prevent
To prevent casks from rolling.