Rheo-

Rheo- (from the Greek rheo - “flow” and rheos - “current, flow”) is a prefix used in scientific terms, denoting a relationship to the flow, stream, movement of a liquid or gas.

The prefix rheo- is used to form words related to rheology - the science of deformation and flow of materials. For example:

1. Rheology is the science of deformation and flow of substances.

2. A rheometer is a device for measuring the viscosity of liquids and the plasticity of solids.

3. Rheogram is a graph showing the dependence of flow velocity on shear stress.

4. Rheopexy is elasticity, the ability of a substance to restore its original shape after the cessation of deforming forces.

Thus, the prefix rheo- indicates the connection of the term with such properties of materials as fluidity, viscosity, plasticity, ability to deform and flow.