Definition: A cubic inch per minute (in3/min) is a unit of volumetric flow rate that measures the volume of a substance passing through a surface per unit of time. It represents the amount of volume, measured in cubic inches, that flows every minute.

History/origin: The cubic inch is derived from the inch, a unit of length in the imperial and United States customary systems of measurement. The 'per minute' component indicates the rate at which the volume is changing over time. The exact origin is linked to the establishment of these measurement systems.

Current use: Cubic inches per minute is used in various engineering and manufacturing applications, especially in contexts where precise control over small fluid or gas flow rates is important. It can be found in applications related to engines, pumps, and fluid dynamics testing.