extrados

English

Detail of the skew arch bridge at Boxmoor, showing the stepped extrados (outer curve of the arch)

Etymology

From French extradossé (“outer curve”) from Latin extra (“outside”) + dos (“back”) (from Latin dostrum).

Noun

extrados (plural extradoses or extrados)

1. (architecture) The outer or upper curve of an arch.

Coordinate terms

• intrados

Derived terms

• extradosed