noun
- An alloy of iron and nickel that has a very low coefficient of thermal expansion, used in precision instruments and scientific equipment.
Usage: technical; trademark (originally)
Examples
- The pendulum was made of invar to minimize changes in length due to temperature fluctuations.
- Invar is commonly used in the manufacture of precision clocks and measuring instruments.
- Because of its stability, invar is ideal for applications requiring dimensional accuracy across varying temperatures.
- The scientist selected invar for the telescope's frame to prevent thermal distortion.