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Related to Opus reticulatum: opus testaceum
Permanent formwork for ancient Roman concrete, consisting of stones or bricks set diagonally.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A decorative Roman wall facing, backed by a concrete core, formed of small pyramidal stones with their points embedded in the wall, their exposed square bases, set diagonally, forming a net-like pattern.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.