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1. The insertion of stone chips into the joints of rough masonry to reduce the amount of mortar required, to wedge larger stones in position, or to add detail to the appearance.
2. Pieces of tile used to provide a suitable bed for ridge tile or hip tile.
3. The insertion of small pieces of flint or colored stone in soft mortar; serves as a decorative element.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.