Invar

[ in-vahr ]

/ ɪnˈvɑr /

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Trademark.

a brand of iron alloy containing 35.5 percent nickel and having a very low coefficient of expansion at atmospheric temperatures.

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Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.

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In the UK, COTTON CANDY is more commonly known as…

candystring

candyfloss

candypuff

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Words nearby Invar

invalidate, invalidism, invalidity, invalidity benefit, invaluable, Invar, invariable, invariably, invariance, invariant, invariant mass

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use Invar in a sentence

As they ran, Invar's foot dislodged a boulder which thundered down the slope.
B. C. 30,000|Sterner St. Paul Meek
As the ramifications of the plan seeped into Invar's brain, his face glowed with enthusiasm.
B. C. 30,000|Sterner St. Paul Meek
Invar raised a rock high above his head with both hands and cast it at her.
B. C. 30,000|Sterner St. Paul Meek
Invar is practically non-expansible when the nickel in it is about 37%.
Time Telling through the Ages|Harry Chase Brearley

In time-keeping invar is likely to be as valuable as in surveying.
Inventors at Work|George Iles

British Dictionary definitions for Invar

Invar

/ (ɪnˈvɑː) /

noun

trademark an alloy containing iron (63.8 per cent), nickel (36 per cent), and carbon (0.2 per cent). It has a very low coefficient of expansion and is used for the balance springs of watches, etc

Word Origin for Invar

C20: shortened from invariable

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012