- The shoulder. - A chip or fragment, especially a chip of stone as struck off
the block by the hammer, having at least one feather-edge.
2 . Spall
[ v. i.]
- 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.
3 . Spall
[ v. t.]
- To break into small pieces, as ore, for the purpose of
separating from rock. - To reduce, as irregular blocks of stone, to an
approximately level surface by hammering.
Meaning of 'spall' (Princeton's WordNet)
1 . spall
[ n]
Meaning (1): - a fragment broken off from the edge or face of stone or ore and having at least one thin edge