 ##  [Viscosity](/viscosity) 

  ##  [Viscosity](https://natural.quantumdictionary.io/viscosity-0) 

  
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**Natural &amp; Formal Sciences Dictionary**

 
Definition

Measure of a fluid's resistance to shear or flow; commonly given as dynamic viscosity (η) with units pascal-seconds (Pa·s) or kinematic viscosity (ν) as m²·s⁻¹ when divided by density.