Sawdust (noun)

1. Fine particles of wood created by sawing or grinding wood.
2. A mixture of such particles and other materials, such as metal shavings or coal dust, used as a filler or insulator.

Origin:

Sawdust is a by-product of cutting, grinding, drilling, or sanding wood or other materials.

Examples:

1. He swept up the sawdust after cutting the wood.
2. Sawdust is often used as a filler in animal bedding.
3. The sawdust was used to fill the gaps in the wall.
4. The sawdust created by the mill was reused as fuel for the boiler.
5. The sawdust is mixed with resin to make a fireproof material.