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nounwedge-shaped stone building block used in constructing an arch or vaulttype of:part of:
Definition that contains voussoir
- rowlock arch an arch that is formed with more than one concentric row of voussoirs
- straight arch an arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados
- flat arch an arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados