coign

1. A projecting corner or angle; a cornerstone.

2. The keystone of an arch.

   the keystone of an arch

3. A wedge used in typesetting.

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

4. A a corner of a crystal formed by the intersection of three or more faces at a point (in crystallography)

5. An original angular elevation of land around which continental growth has taken place (in geology)

правильный

• coignealternative