spall

A chip, fragment, or flake from a piece of stone or ore.

To break up into chips or fragments.

To chip or crumble.

A chip or splinter thrown off, as in chopping or hewing; now specifically, in masonry, a piece of stone chipped off by a blow of a hammer or mallet.

The shoulder.

To split; splinter; chip; specifically, in mining, to chip or break up roughly, as ore, preparatory to sorting the material.

To keep (the frames of a ship) at their proper distance apart.

To splinter; chip; give off spalls.

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.