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viscosity index: Meaning and Definition of

viscos'ity in"dex

Pronunciation: [key]
— Auto., Mach. Auto.,Mach.
  1. an arbitrary scale for lubricating oils that indicates the extent of variation in viscosity with variation of temperature.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
viscosity viscount
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