ClipArt ETC
"The main rib or arch-band which crosses a vault at right angles and separates adjoining bays from each other. Image: Arcs in vaulting, perspective and plan. A B, C D, arcs doubleaux; A D, C B, arcs ogives; A C, B D, arcs formerets."-Whitney, 1902

Arc Boutant

"The main rib or arch-band which crosses a vault at right angles and separates adjoining bays from each…

An image of a bay.

Bay

An image of a bay.

Architecture of Cathredals in England. Two bays of choir, interior, Peterborough Cathedral, Norman Style.

Bays of Choir

Architecture of Cathredals in England. Two bays of choir, interior, Peterborough Cathedral, Norman Style.

An image of a straight with boats going through it.

Straight

An image of a straight with boats going through it.