noun
- Plural of invar; alloys of iron and nickel that have very low thermal expansion, used in precision instruments and scientific equipment.
Usage: technical; usually used in plural or as a mass noun
Examples
- The laboratory uses invars in the construction of pendulums to minimize temperature-related measurement errors.
- Invars are valued in watchmaking for their stability across temperature variations.
- The telescope's frame was made from invars to ensure dimensional consistency.
- Scientists selected invars for the experiment because of their exceptional low expansion coefficient.