Definitions

1. noun

A device used to measure the flow of a fluid, such as blood or air, through a narrow passage.

“The rheoscope helped the researchers study the flow of blood through the capillaries.”

2. noun

A microscope used to study the flow of fluids in the body or a device for observing the movement of particles in a fluid.

“The rheoscope was essential for the study of the circulatory system.”