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Definition of Newtonian fluid
1. Noun. (physics) a fluid whose stress at each point is linearly proportional to the strain rate at that point ¹
¹ Source: wiktionary.com
Medical Definition of Newtonian fluid
1. A fluid in which flow and rate of shear are always proportional to the applied stress; such fluid precisely obeys Poiseuille's law. Compare: non-newtonian fluid. (05 Mar 2000)