groined rib

groined rib

A rib under a curve of a groin, used as a device to either mask or support it.
See also: Rib
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

groined rib

groined rib: A shows an enlarged section
A rib under the curve of a groin, either to mask the groin or to support it.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.