Electrorheological fluid is a type of smart fluid that has the unique property of changing its viscosity when exposed to an electric field. It is commonly used in various industrial and engineering applications, such as shock absorbers, brakes, clutches, and dampers. Synonyms for electrorheological fluid include electrofluid, smart fluid, magnetorheological fluid, and magnetofluidic fluid. Magnetorheological fluid is similar to electrorheological fluid, but instead of an electric field, it responds to a magnetic field. On the other hand, magnetofluidic fluid is a combination of magnetic and fluidic properties that can be applied in microfluidic systems, sensing devices, and biomedical implants.