Supercooling helps an aqueous solution, without ice forming, to achieve temperatures below the potential freezing point. To initiate ice crystal formation, ice formation involves aggregation of water molecules at what are known as nucleation centres.
Since glass is an amorphous solid, glass is considered a supercooled liquid. The propensity for amorphous solids to flow, albeit slowly. therefore it is considered a liquid that is supercooled. Glass is often referred to as a supercooled liquid because it does not produce a crystalline structure, but instead forms an amorphous solid that encourages molecules to continue to travel in the substance. However, Scientific American indicates that neither supercooled liquids not solids are amorphous solids.