copestone


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capstone

, copestone
Mountaineering a chockstone occurring at the top of a gully or chimney

coping stone, capstone, copestone

coping stone
A stone which forms a coping.
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References in periodicals archive ?
For small erections may be finished by their first architects; grand ones, true ones, ever leave the copestone to posterity.
Another trainee, Simon Copestone, feared for his safety after being drawn into the contest.
as the quarry from whence we get tiles and copestones for the masonry