| NOM | artifact | pedra clau | the central building block at the top of an arch or vault |
|---|
| Sentit | The central building block at the top of an arch or vault. | |
|---|---|---|
| Part de | arc | (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it |
| Anglès | keystone, key, headstone | |
| Espanyol | piedra clave | |
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