quoin
(noun)
noun
1. expandable metal or wooden wedge used by printers to lock up a form within a chase
Similar word(s): coign, coigne
Definition categories: man–made, wedge
2. the keystone of an arch
Similar word(s): coign, coigne
Definition categories: man–made, headstone, key, keystone
3. (architecture) solid exterior angle of a building; especially one formed by a cornerstone
Similar word(s): corner
Definition categories: man–made, construction, structure