spall

About 0.09 uses per million words.

Meaning

noun A splinter, fragment or chip, especially of stone.
noun A process of weathering, aging, or other wear that involves the crumbling of the substrate.
The failure of this bearing involved spall under high load.
verb To break into fragments or small pieces.
verb To undergo weathering, aging, or other wear that involves the crumbling of the substrate.
When the bearing race spalled under high load, it led to the failure of the bearing.
verb To reduce, as irregular blocks of stone, to an approximately level surface by hammering.
noun The shoulder.