coigne

Thesaurus

Noun	1.	coigne - expandable metal or wooden wedge used by printers to lock up a form within a chasecoign, quoinwedge - something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them
	2.	coigne - the keystone of an archcoign, quoinheadstone, keystone, key - the central building block at the top of an arch or vault