Definitions for "Frass"
The dust-like debris or excrement left behind by wood-eating larvae and boring insects.
Another term for larval insect droppings or excretion.
Solid larval insect excrement; mixed with wood fragments in woodboring or bark-boring insects.[1] Fin. Swe.
Keywords:  sulfur
Sulfur
Powdered wood caused by the activity of woodworm.