Spall
n.
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The shoulder. [Obs.]
Spall
n.
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A chip or fragment, especially a chip of stone as struck off the block by the hammer, having at least one feather-edge.
Spall
v. t.
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To break into small pieces, as ore, for the purpose of separating from rock. (Mining)
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To reduce, as irregular blocks of stone, to an approximately level surface by hammering. (Masonry)
Spall
v. i.
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To give off spalls, or wedge-shaped chips; -- said of stone, as when badly set, with the weight thrown too much on the outer surface.