What is the term that describes the thickness of a liquid?

The term that describes the thickness of a liquid is viscosity. Viscosity refers to a liquid's resistance to flow; the higher the viscosity, the thicker the liquid and the more it resists movement. For example, honey has a higher viscosity than water, meaning honey flows more slowly than water due to its thickness.

In the context of liquids, viscosity is a crucial property because it affects how substances behave in various situations, such as in cosmetic formulations, where the desired texture and flow of creams, lotions, or gels depend on their viscosity. This understanding is important in fields like esthetics and cosmetic science, where the application and performance of products can be significantly influenced by their viscosity.