My 13 year old son came into my workshop tonight as I was in the process of emptying another full load from my DC. He asked what I was doing. "Emptying out the sawdust" I told him, to which he replied "That's not sawdust, it's wood dust. I don't see any bits of saw in it!".
He's right. Most of the wood dust comes from my router, planer, jointer, and various sanding machines anyway, not from the saws, and there are no bits of saw in it at all !!
Why do we call it sawdust and not wood dust?