liquidinglass

Liquidinglass is not a single, widely recognized term in science or industry. Depending on context, it may refer to a state, a material, a product name, or simply a shorthand for phrases such as "liquid in glass." Because there is no universal definition, explanations typically rely on accompanying information.

In historical thermometry, the related term "liquid-in-glass" describes a thermometer in which a liquid (commonly mercury or dyed alcohol) expands or contracts within a narrow glass capillary to indicate temperature. These devices are among the oldest temperature-measuring instruments and are still used in some applications, though mercury use is increasingly restricted.

In materials chemistry, "liquid glass" is a common name for aqueous sodium silicate solutions, also called water glass. When applied to a surface and dried, they can form a glassy film or cement-like binder. They are used as sealants, corrosion inhibitors, coatings, and in some crafts for glazing or binding silica-based materials.

In glass science, the phrase may describe the molten state of silica or glass. Glass is an amorphous solid that behaves like a very viscous liquid at high temperatures; while some folklore claims slow room-temperature flow, modern understanding treats glass as a solid with extremely high viscosity under normal conditions.

The term "liquidinglass" thus lacks a single, fixed meaning and is best interpreted from its specific use, product description, or scientific context. See also related concepts such as liquid in glass thermometry, water glass, sodium silicate, and amorphous solids.