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

Take Invar, and allow of nickel and iron.

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They found that Questar telescopes—used by hobbyists for more than half a century—fit the space perfectly, so they ordered a couple of custom ones fashioned out of Invar, a thermally stable nickel-iron alloy.

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Invar, a nickel-steel alloy, which also has an extremely small coefficient of expansion, is used in making clock pendulums, which are unaffected by change of temperature.

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Invar's knife found her heart, and she sank back dead.

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I hope the meal was with you this day, thirty-five bolls,—for it was at Invar last night.

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