keystone
1 of 1noun/ˈkistoʊn/
Forms:keystones
1
a stone located at the top center of an arch, keeping all the other stones together
C2Learn more on WikipediaIn architecture, a keystone is the central stone at the top of an arch that holds the other stones in place. It is typically larger than the other stones and is shaped to fit perfectly into the arch's curve. The keystone plays a crucial role in distributing weight and maintaining the stability of the arch. Besides its functional importance, the keystone can also serve as a decorative element, often featuring unique carvings or designs. This feature enhances the overall beauty of the structure while providing essential structural support.
- The archway was supported by a central keystone, which locked the structure into place and distributed the weight evenly.
- The Renaissance bridge featured a carved keystone depicting a mythological figure, serving as a focal point of the design.
- The neoclassical building had a pediment adorned with a sculpted keystone, symbolizing strength and stability.
- The Gothic cathedral's ribbed vaults met at the keystones, creating a network of intersecting arches that soared overhead.
- The Art Deco façade was embellished with geometric motifs, including a stylized keystone at the center of each archway, adding a touch of modern elegance.
2
a central element or factor that provides essential support or cohesion to a system or concept
- Trust is the keystone of any successful relationship.
- Renewable energy is the keystone of the city's sustainability plan.
- Education serves as the keystone of societal development.
- Communication was the keystone of the team's success.
- Ethics act as the keystone in the company's corporate culture.