Rheology is the study of the deformation and flow of matter. The term rheology was coined by Eugene Bingham, a professor at Lehigh University, in 1920, from a suggestion by Markus Reiner[?], inspired by the Heraclitus' famous expression "panta rhei": everything flows. Rheology has important applications in the engineering sciences and in physiology. Hemorheology[?] is the study of the flow properties of blood.