Viscous liquids are fluids that have a thick, sticky consistency, making them resistant to flow. This property, known as viscosity, is influenced by the liquid's molecular structure and temperature. Common examples of viscous liquids include honey, molasses, and glycerin. The viscosity of a liquid can be measured using various methods, such as a viscometer. Higher temperatures generally reduce viscosity, allowing the liquid to flow more easily. Understanding viscosity is important in many fields, including food science, engineering, and pharmaceuticals, as it affects how liquids behave in different applications.