Definition

The outer curve or surface of an arch, which is the opposite side of the intrados.

Example

The architect designed the extrados of the arch to be both functional and aesthetically pleasing.

Conversation

Have you ever noticed the extrados of an arch while walking through the park?

Yeah, it's really interesting how the shape supports the structure.

Exactly! The extrados is such a crucial part of its design.

For sure, it makes you appreciate architecture so much more.

Synonyms & Antonyms

Root Explanation

Extrados → It is formed from "extra-" (meaning outside) and "dorsum" (meaning back). The term refers to the outer curve or surface of an arch, which is the part that is on the outside or upper side of the structure.

Memory Tip

Think of the 'outside' ('extra-') of an arch's 'back' ('dorsum') — that's why extrados refers to the outer curve of an arch.

Visually Confused Words