noun
wood chips; wood offcuts; wood shavings; sawdust
General term for small pieces of wood produced as waste or by-product from cutting, planing, or sawing.
作業台の上に木くずが散らばっている。
Wood chips are scattered on the workbench.
大工さんが木くずを掃除した。
The carpenter cleaned up the wood shavings.
おがくず specifically refers to sawdust, while 木くず is a broader term covering chips, offcuts, and shavings as well.
Compound of 木 (ki, 'wood') and 屑 (kuzu, 'waste, scraps'). The reading きくず is a straightforward combination.