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Glite Dictionary
Invar

Invar

1 9.6
A metal made of iron and nickel that hardly changes size when it gets hot or cold
  • noun
  • /ˈɪnvɑr/
  • Specialized
: Invar
  • The clock's mechanism relied on Invar for its pendulum to ensure accuracy over temperature changes.

Examples

  • Figure 7(d) for this tool was made by molding a 30- to 200-micron-thick prepolymer layer against a flexible, 75- to 150-micron-thick steel, Invar, or glass backplane and the master.

    Academic text (2001)

  • The only reasonable choice for the mask material is Invar, a steel alloy with a small coefficient of thermal expansion.

    Academic text (1999)

  • We eventually found out that the large presses were deforming the Invar tools.

    Academic text (1997)

  • The amount of gas will still be the same, the volume will still be the same (I made the container out of Invar), so the density will still be the same; but the pressure will settle at a slightly lower pressure in accordance with the gas law.

    Blog text (18)

  • The engineer selected Invar for the precision instruments due to its low thermal expansion.

  • Invar is used in devices that need to maintain precise dimensional stability.

Surface Forms

Invar singular
Invars plural

Etymology

Invar comes from the word invariable, which means 'not changing'. That's why Invar is the name of a metal alloy that hardly changes size with temperature and is used in precise instruments.