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One covering a square bay where two barrel vaults of equal diameter and height intersect. See also: Vault
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
groined vault, groin vault
A compound vault in which barrel vaults intersect, forming arrises called groins.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.