\Spall\, n. [OF. espaule; cf. It. spalla. See {Epaule}.]
The shoulder. [Obs.] --Spenser.

\Spall\, n. [Prov. E. spall, spell. See {Spale}, {Spell} a
splinter.]
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.
1. (Mining) To break into small pieces, as ore, for the
   purpose of separating from rock. --Pryce.
2. (Masonry) To reduce, as irregular blocks of stone, to an
   approximately level surface by hammering.

\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.