Frass ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ« Back to Glossary IndexTags: Conservation, Furniture, Historic Frames, Insect Infestation, ObjectsA fine dust or support material left behind from a feeding insect. Often is referred to having the appearance of sawdust. Related Articles: Emergency Care-Insect Infestation in Wooden Artifacts, Frames and Furniture« Back to Glossary Index