Glass is considered to be a supercooled liquid because of the fact that it is an amorphous solid and similar to liquids, amorphous solids also have a tendency to flow, though the rate is very slow.This phenomenon can be observed in glass window panes of old houses where glass flows down and gets accumulated at the bottom as it flows.
Final Answer:
Hence, glass is considered to be a super cooled liquid or pseudo solid as it can flow similar to liquids though the rate of flow is comparatively much slower.