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viscosity

noun

vis·​cos·​i·​ty vi-ˈskä-sə-tē How to pronounce viscosity (audio)
plural viscosities
1
: the quality or state of being viscous : a sticky or glutinous consistency
2
a
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

Example Sentences

conducted an experiment to determine the viscosity of motor oil
Recent Examples on the Web Check the viscosity of the sauce and swirl in more slurry if needed. Caron Golden, San Diego Union-Tribune, 7 Sep. 2022 The synergistic blend of ingredients work to support synovial fluid viscosity as well as normal cartilage flexibility. The Salt Lake Tribune, 17 Aug. 2022 The hypothesis is that dehydration increases blood viscosity or thickness. Dr. Michael Daignault, USA TODAY, 28 July 2022 The soybean oil aids in mixing the compound that is extruded to become tire tread and was found to provide a greater reduction in viscosity, Woloszynek said, which enables Goodyear to use less of it in the process. Peter Krouse, cleveland, 7 June 2022 However, is reduced viscosity important when rehydrating after exercise? Dr. Michael Daignault, USA TODAY, 28 July 2022 The rheometer twists the fluid between parallel disks in order to measure its viscosity. Jennifer Ouellette, Ars Technica, 19 Apr. 2022 The researchers suggest salivary gland ionocytes probably regulate saliva pH and viscosity and secrete the growth factor that is crucial for salivary gland repair. Joanna Thompson, Scientific American, 21 June 2022 The formulas within the RHA family, which includes RHA 2, RHA 3, RHA 4, and Redensity, are numbered according to their density and viscosity, says Dr. Devgan. Lauren Caruso, Allure, 16 June 2022 See More

Word History

Etymology

Middle English viscosite, from Anglo-French viscosité, from Medieval Latin viscositat-, viscositas, from Late Latin viscosus viscous

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of viscosity was in the 14th century

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