where is called "total pressure", and is "dynamic pressure". Many authors refer to the pressure as static pressure to distinguish it from total pressure and dynamic pressure . In "Aerodynamics", L.J. Clancy writes: "To distinguish it from the total and dynamic pressures, the actual pressure of the fluid, which is associated not with its motion but with its state, is often referred to as the static pressure, but where the term pressure alone is used it refers to this static pressure."