Invar

[ in-vahr ]

Trademark.

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

Invar

/ ɪnˈvɑː /

noun

1. 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 History and Origins

Origin of Invar¹

C20: shortened from invariable

Example Sentences

As they ran, Invar's foot dislodged a boulder which thundered down the slope.

From Project Gutenberg

As the ramifications of the plan seeped into Invar's brain, his face glowed with enthusiasm.

From Project Gutenberg

Invar raised a rock high above his head with both hands and cast it at her.

From Project Gutenberg

Invar is practically non-expansible when the nickel in it is about 37%.

From Project Gutenberg

In time-keeping invar is likely to be as valuable as in surveying.

From Project Gutenberg