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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

/ ɪˈɑː /

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
“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
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Word History and Origins

Origin of Invar1

C20: shortened from invariable
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Example Sentences

Examples have not been reviewed.

Take Invar, and allow of nickel and iron.

From

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.

From

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.

From

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

From

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

From

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