vis·cos·i·ty

[vi-skos-i-tee]
noun, plural vis·cos·i·ties.
1.
the state or quality of being viscous.
2.
Physics.
a.
the property of a fluid that resists the force tending to cause the fluid to flow.
b.
the measure of the extent to which a fluid possesses this property.
Origin:
1375–1425; late Middle English < Medieval Latin viscōsitās, equivalent to Latin viscōs(us) viscous + -itās- -ity

Related forms
hy·per·vis·cos·i·ty, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
viscosity (vɪsˈkɒsɪtɪ) [Click for IPA pronunciation guide]
 
—n , pl -ties
1.  the state or property of being viscous
2.  physics
 a.  the extent to which a fluid resists a tendency to flow
 b.  kinematic viscosity See also specific viscosity Also called: absolute viscosity, η a measure of this resistance, equal to the tangential stress on a liquid undergoing streamline flow divided by its velocity gradient. It is measured in newton seconds per metre squared

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Viscosity is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a fool or simpleton; ninny.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
American Heritage
Medical Dictionary

viscosity vis·cos·i·ty (vĭ-skŏs'ĭ-tē)
n.

  1. The condition or property of being viscous.

  2. The degree to which a fluid resists flow under an applied force, measured by the tangential friction force per unit area divided by the velocity gradient under conditions of streamline flow; coefficient of viscosity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
viscosity   (vĭ-skŏs'ĭ-tē)  Pronunciation Key 
The resistance of a substance to flow. For example, water has a lower viscosity than molasses and flows more easily. Viscosity is related to the concept of shear force; it can be understood as the effect of different layers of the fluid exerting shearing force on each other, or on other surfaces, as they move against each other. Viscosity lies behind the skin friction component of drag. ◇ Kinematic viscosity is a measure of the rate at which momentum is transferred through a fluid. It is measured in stokes. ◇ Dynamic viscosity is a measure of the ratio of the stress on a region of a fluid to the rate of change of strain it undergoes. It is equal to the kinematic viscosity times the density of the fluid. It is measured in pascal-seconds or poises.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
viscosity [(vis-kos-uh-tee)]

The internal friction of a fluid, produced by the movement of its molecules against each other. Viscosity causes the fluid to resist flowing.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences from the web
The viscosity of lava is important because it determines how the lava will behave.
This resin has lower viscosity than polyester resin, and is more transparent.
Images for viscosity
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