rosace
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rosette
rosette, 1
1. A round pattern with a carved or painted conventionalized floral motif; a rosace.
2. A circular or oval decorative wood plaque used in joinery, such as one applied to a wall to receive the end of a stair rail.
3. An ornamental nailhead or screwhead.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.