Definition: A fluid ounce per second (fl-oz/s) is a unit of volumetric flow rate that measures the volume of a fluid passing through a surface per unit of time. It represents the amount of fluid volume, measured in fluid ounces, that flows every second.

History/origin: The fluid ounce is a unit of volume in the imperial and United States customary systems of measurement. Its historical origins can be traced back to systems of apothecary measures and later standardization for commercial purposes. The 'per second' component indicates a rate of change over time.

Current use: Fluid ounces per second is used in situations where measuring relatively quick fluid flow is required. It is commonly used in applications such as dispensing systems, high-speed filling operations, and scientific experiments involving fluid dynamics.