smeddum

smeddum (uncountable)
Fine powder; flour.
The powder or finest part of ground malt.
(mining) Smitham.
(Scotland) Zest, energy; pluck; sagacity; quickness of apprehension; gumption; spirit; mettle.
(Britain dialectal, Northern England) Ore small enough to pass through the wire bottom of a sieve.
(Britain dialectal, Northern England) A layer of clay or shale between two beds of coal.