Mining. [varr. of SMEDDUM.] = SMITHAM 2. Also attrib.
1821. W. Forster, Section of Strata (ed. 2), 341. The Ore, that collects at the bottom of the Tub, is called Smiddum.
1858. Simmonds, Dict. Trade, Smiddum-tails, in mining, the sludge or slimy portion deposited in washing ore.
1894. Heslop, Northumbld. Gloss., Smiddum, small particles of lead ore [etc.].
