Dust is made of fine particles of solid matter. Both start with the raw materials in solid form. Camphor () is a waxy, flammable, transparent solid with a strong aroma. It is a black synthetic magnetic solid. Bitumen occurs as a solid or highly viscous liquid. Extruded WPCs are formed into both solid and hollow profiles. The ball is neither solid nor hollow. Williams also possesses a very solid and powerful overhead. It comes in many colours, both solid and patterned. They may be of solid or framed construction. This method is useful for studying vibrations of molecules adsorbed on a solid surface. Doxorubicin showed better activity than daunorubicin against mouse tumors, and especially solid tumors. Fluids are composed of molecules that collide with one another and solid objects. There are a number of angles associated with each Platonic solid. Hail is a form of solid precipitation.