Pascal-seconds is a unit of measurement used in fluid dynamics to describe the viscosity of a fluid. It combines the unit of pressure, Pascal, with time, indicating how much force is needed to move a fluid over a certain distance. A higher value means the fluid is more viscous, or thicker, while a lower value indicates a thinner fluid. In practical terms, Pascal-seconds helps engineers and scientists understand how fluids behave under different conditions. This measurement is crucial in industries like oil and gas, food processing, and pharmaceuticals, where fluid flow and consistency are essential for product quality and safety.