An "amorphous solid" is a solid in which there's no long-range order of the positions of the atoms. (Solids in which there's long-range atomic order are called crystalline solids or morphous). Most classes of solid materials can be found or prepared in an amorphous form. For instance, common window glass is an amorphous solid, many polymers (such as polystyrene) are amorphous, and even foods such as cotton candy are amorphous solids. In principle, given a sufficiently high cooling rate, any liq… (More on Amorphous)