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A continuous, projecting rib connecting the apexes of the intermediate ribs of a rib vault with the center of the vault.See also: Rib
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
1. A horizontal rib marking the crown of a compartment of vaulting, characteristic of English Gothic architecture from the early 13th cent. on, but occasionally found on the Continent.
2. A rib which follows the ridge of a vault.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.