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1. See parting slip.
2. A longitudinal division or partition, as a withe in a chimney or as in a cased frame.
parting slip, midfeather, wagtail
A long thin strip of wood in the box jamb of a cased frame which separates the sash weights from each other; also called a parting strip, parting bead.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.