Invar

trademark
In·​var | \ ˈin-ˌvär How to pronounce Invar (audio) \

Definition of Invar

used for an alloy of iron and nickel that does not expand much when heated

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“Invar.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/invars. Accessed 18 January 2020.

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