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viscosity Line breaks: vis|cos¦ity
Pronunciation: /vɪˈskɒsɪti/

Definition of viscosity in English:

noun (plural viscosities)

[mass noun]
1The state of being thick, sticky, and semi-fluid in consistency, due to internal friction: cooling the fluid raises its viscosity
More example sentences
  • Water so treated will show a change of temperature, surface tension, viscosity and electrical conductivity.
  • Electronics also compensate for changes in oil viscosity for consistent operation at all temperatures.
  • Once aspirated, due to their low viscosity and surface tension, they reach the dependent portion of the lung and cause a chemical pneumonia.
1.1 [count noun] A quantity expressing the magnitude of internal friction in a fluid, as measured by the force per unit area resisting uniform flow: silicone oils can be obtained with different viscosities
More example sentences
  • However, the temperature effect on the diffusion boundary layer involves the 1/6 power of the ratio of kinematic viscosities of water at the two temperatures.
  • Whitaker used numerical methods to develop the interface between the two fluids with different viscosities in a Hele-Shaw cell.
  • The problem involves materials of different densities, different viscosities, with very large variations in local Reynolds number (convection divided by viscous diffusion) and hydraulic conditions.


Late Middle English: from Old French viscosite or medieval Latin viscositas, from late Latin viscosus (see viscous).

Words that rhyme with viscosity

anfractuosity, animosity, atrocity, bellicosity, curiosity, fabulosity, ferocity, generosity, grandiosity, impecuniosity, impetuosity, jocosity, luminosity, monstrosity, nebulosity, pomposity, ponderosity, porosity, preciosity, precocity, reciprocity, religiosity, scrupulosity, sinuosity, sumptuosity, velocity, verbosity, virtuosity
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