severy

1. (architecture) A compartment of a vaulted ceiling.Examples: "A handsome flight of steps, extending across the whole from wall to wall, occupied nearly the whole of the eastern severy, and led up from the pavement of this building to the great west door of the church, which terminates the interior eastward, and was designed and built in connection with it."; "Cylindrical severies would have no place between these arches."; "Because the two wall arches of each chapel are not centrally located in relation to the vault severies above them (27), these severies are asymmetrical (Illustrations 16 and 21)."