fan vault

(redirected from fan groin)
Also found in: Encyclopedia.

fan vault

n.
A rib vault in which slender curving ribs radiate upward from the top of a column like the ribs of a fan to form inverted half cones. Common in late English Gothic architecture, fan vaults are often decorated with intricate tracery or paneling.

fan′ vault`


n.
a vault composed of a number of concave conoid surfaces touching or intersecting at the top, with curved fanlike ribs radiating from the spring.