viscosity

noun vis·cos·i·ty \ vi-ˈskä-sə-tē \

Definition of viscosity

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

Examples of viscosity in a Sentence

  1. conducted an experiment to determine the viscosity of motor oil

Recent Examples of viscosity from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'viscosity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of viscosity

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

Other Chemical Engineering Terms


Medical Dictionary

viscosity

noun vis·cos·i·ty \ vis-ˈkäs-ət-ē \

medical Definition of viscosity

plural viscosities
1 :the quality of being viscous; especially :the property of resistance to flow in a fluid or semifluid
2 :the 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


Seen and Heard

What made you want to look up viscosity? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

serious difficulty or misfortune

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!