plural viscosities
Definition of viscosity
1
: the quality or state of being viscous : a sticky or glutinous consistency
2a
technical
: the property of resistance to flow in any material with fluid properties
… water has a small but measurable viscosity, or "stickiness," which results from the weak mutual attraction of water molecules.— Hans Christian von Baeyer
b
: the mathematical ratio of the tangential frictional force per unit area to the velocity gradient perpendicular to the direction of flow of a liquid
— called also coefficient of viscosity
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Merriam-Webster unabridged
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Time Traveler for viscosity
The first known use of viscosity was in the 14th century
See more words from the same century