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coefficient of viscosity

noun Physics.
  1. the measure of the viscosity of a fluid, equal to the force per unit area required to maintain a difference of velocity of one unit distance per unit time between two parallel planes in the fluid that lie in the direction of flow and are separated by one unit distance: usually expressed in poise or centipoise.
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Origin of coefficient of viscosity

First recorded in 1920–25
Also called absolute viscosity, dynamic viscosity.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018