viscosity index


viscosity index

noun

Definition of VISCOSITY INDEX

: an arbitrary number assigned as a measure of the constancy of the viscosity of a lubricating oil with change of temperature with higher numbers indicating viscosities that change little with temperature

First Known Use of VISCOSITY INDEX

1929

Browse

Next Word in the Dictionary: viscount
Previous Word in the Dictionary: viscosity breaking
All Words Near: viscosity index

Seen & Heard

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

Test Your Vocabulary

Take Our 10-Question Quiz

Name That Thing

Take our visual vocab quiz

Test Your Knowledge »

True or False?

A quick quiz about stuff worth knowing

Take It Now »

Join Us on FB & Twitter

Get the Word of the Day and More

Facebook | Twitter

Get Our Free Apps

Voice Search, Favorites,
Word of the Day, and More

iPhone | iPad | Android | More