Definition

1. Noun:
   • The exterior curve of an arch: In architecture, the extrados is the outer, convex curve or surface of an arch, vault, or similar structure. It is the curve that is visible from the outside, opposite to the intrados (the inner curve).

Usage Examples

• Noun:
  • The stonework on the extrados of the Roman aqueduct was remarkably well-preserved.
  • The architect examined the extrados to check for any signs of weathering or stress.

Advanced Usage

• Technical Description: The extrados is a critical structural element. Its shape and integrity help distribute the load carried by the arch down to its supports (abutments or piers).
  • The design calculations must account for the precise curvature of the extrados.

Variants and Related Words

• Intrados (n): The interior curve or underside of an arch. It is the direct opposite of the extrados.
  • The decorative carvings were located on the intrados of the gateway.

Synonyms

• Back of an arch: A less technical term for the extrados.
• Outer curve: A descriptive synonym emphasizing its location.

Notes on Meaning

• This is a highly specialized architectural term. In everyday language, it is rarely used outside of technical contexts related to construction, history, or architecture. The concept is always contrasted with the intrados.

Noun

1. the exterior curve of an arch