coign

Noun
  1. Expandable metal or wooden wedge used by printers to lock up a form within a chase (synset 104042480)
    is a 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
    same as: coigne, quoin
  2. The keystone of an arch (synset 104042388)
    is a type of: headstone, key, keystone - the central building block at the top of an arch or vault
    same as: coigne, quoin

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