n. (pl. -ies)
1. the quality or degree of being viscous.
2 Physics a (of a fluid) internal friction, the resistance to flow. b a quantity expressing this.
Phrases and idioms:
dynamic viscosity a quantity measuring the force needed to overcome internal friction. kinematic viscosity a quantity measuring the dynamic viscosity per unit density.
Derivatives:
viscosimeter n.
Etymology: ME f. OF viscosit{eacute} or med.L viscositas (as VISCOUS)