Definition that contains building block
- key the central building block at the top of an arch or vault
- headstone the central building block at the top of an arch or vault
- keystone the central building block at the top of an arch or vault
- clinker block a light concrete building block made with cinder aggregate
- cinder block a light concrete building block made with cinder aggregate
- voussoir wedge-shaped stone building block used in constructing an arch or vault
- breeze block a light concrete building block made with cinder aggregate