coigne

Definitions of coigne
1

n the keystone of an arch

Synonyms:
coign, quoin
Type of:
headstone, key, keystone
the central building block at the top of an arch or vault

n expandable metal or wooden wedge used by printers to lock up a form within a chase

Synonyms:
coign, quoin
Type of:
wedge
something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them

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