👉 In physics, an aspirate is a liquid that flows from a piston or cylinder in a pump or compressor. It is typically used to extract fluids such as oil and water from the cylinders of engines, turbines, and other machinery. Aspirates are often used for reducing pressure, which can be important when compressing gases at high pressures. They can also be used for separating different types of liquids or gases through physical means, such as evaporation or condensation.