coign

Plural: coigns

Noun

• expandable metal or wooden wedge used by printers to lock up a form within a chase
• the keystone of an arch
• A projecting corner or angle; a cornerstone.
• The keystone of an arch.
• A wedge used in typesetting.
• A a corner of a crystal formed by the intersection of three or more faces at a point (in crystallography)
• An original angular elevation of land around which continental growth has taken place (in geology)

Verb

• To furnish with coigns.
• -ED, -ING, -S to quoin

Synonyms

coigne, quoin