quoin
noun
[ kɔɪn ]
• an external angle of a wall or building.
• "smaller stations followed the same pattern; stone-built, with strongly accented quoins"
• a wedge or expanding mechanical device used for locking a letterpress forme into a chase.
• a wedge for raising the level of a gun barrel or for keeping it from rolling.
quoin
verb
• provide (a wall) with quoins or corners.
• "the white plaster walls quoined with red sandstone blocks"
• lock up (a forme) with a quoin.
Origin:
Middle English: variant of coin, used earlier in the sense ‘cornerstone’ and ‘wedge’.
