'veinstuff' definitions:

Definition of 'veinstuff'

From: GCIDE

Veinstone \Vein"stone`\, n. (Mining) The valueless nonmetalliferous mineral or rock material which surrounds the ores in a vein, as quartz, calcite, barite, fluor spar, etc.; gangue; matrix; -- called also veinstuff. [1913 Webster]