The fine particles of wood created by sanding, typically finer than sawdust.
1996, Ann Chambers, Susan D. Kerr, Power Industry Dictionary, PennWell, →ISBN, page 352:
1975, Forest Products Research Society, Wood Residue As An Energy Source, Knowledge Publications, published 2010, →ISBN, page 87:
Due to the high content of non-combustibles in the sanderdust and drop out of ash in the generating section, it was required to limit the firing rate ...