A wooden block, the size and shape of a brick, built into brickwork to provide a hold for nailing finish material; a nailing block.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
wood brick, fixing brick, nailing block
1. A piece of wood the size and shape of a brick; inserted in brickwork to serve as a means of attaching finishings, etc.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.