Isopropyl Rubbing Alcohol. Most rubbing alcohol is made from isopropyl alcohol or isopropanol in water. It is common to find isopropyl rubbing alcohol at concentrations from 68% alcohol in water up to 99% alcohol in water. The 70% rubbing alcohol is highly effective as a disinfectant.
fluid - a substance that is fluid at room temperature and pressure. 1  substance - the real physical matter of which a person or thing consists; DNA is the substance of our genes.
Medical Definition of fluid. : a substance (as a liquid or gas) tending to flow or conform to the outline of its container; specifically : one in the body of an animal or plantâsee cerebrospinal fluid, seminal fluid.