Filler

In general, a filler is something that is used to fill gaps. Specialized meanings include:

==Materials== Filler (animal food), dietary fiber and other ingredients added to pet foods to provide bulk Filler (materials), particles added to a matrix material, usually to improve its properties Filler (packaging), a machine designed to fill packaging, usually occurs in food packaging Filler metal, metal added in the making of a joint through welding, brazing, or soldering Grain filler, a product that is used to achieve a smooth-textured wood finish Injectable filler, a soft tissue filler injected into the skin to help fill in facial wrinkles Star filler, a plastic insert in computer cables which separates wires