Quoin block | Article about quoin block by The Free Dictionary
2. A square, relatively flat wood block, often decoratively carved, placed at upper corners on each side of the wood framing around a door.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
deterioration analysis conducted by  demonstrated that deterioration in the quoin block
(Figure 3) could drastically affect the state of stresses on the element transferring loads to the pintle and the pintle connection.
Edward's run was particularly memorable as he cut back, stopped and started and left several defenders on the turf -- a few also were taken out by big Du Quoin blocks
-- and had the crowd roaring.
The products distributed throughout South Wales include lintels and sills, quoin blocks
, balustrade walling, York stone paving and Moai heads.