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quoin

quoin

9.9
The central stone at the top of an arch that holds other stones
  • noun
  • /kwɔɪn/
  • Archaic
translation icon : clave
  • The quoin bears the weight of the arch and locks the other stones into position.

Examples

  • Without a properly shaped quoin, the stability of the arch could be compromised.

  • Restorers carefully replaced the damaged quoin during the arch's renovation.

  • The architect chose a beautiful quoin for the entrance arch.

  • Each quoin adds stability to the structure of the arch.

  • Restorers carefully replaced the damaged quoin during the arch's renovation.

  • The quoin bears the weight of the arch and locks the other stones into position.

  • Without a properly shaped quoin, the stability of the arch could be compromised.

Synonyms

key
vsquoin
1 8.4

The central stone at the top of an arch that locks it together

is the same but usually stressed as a specialized wedge shape
keystone
vsquoin
1 7.2

A central stone at the top of an arch that holds it in place

is the same central stone but without the wedge detail
headstone
vsquoin
  • Specialized
1 6.4

The middle stone at the top of an arch that holds it together

is more about the locking wedge function than general structural support
coign
vsquoin
  • Archaic
9.9

A shaped stone placed at the top of an arch to hold it together

is the same central stone but given as the main term
coigne
vsquoin
  • Archaic
9.9

A stone that sticks out at a building corner or arch to hold it together

is the central arch stone specifically, not the corner projection

Surface Forms

quoin singular
quoins plural

Etymology

The word quoin comes from old French coing meaning 'wedge', from Latin cuneus 'wedge'. A helpful image is the wedge-shaped stone at the top center of an arch (the keystone) that locks the other stones together, which is why quoin can mean that central stone.