what does Invar mean?

INVAR as NOUN

Meaning
- an alloy of iron and nickel having a low coefficient of thermal expansion
- used in tuning forks and measuring tapes and other instruments
Hypernyms(s) Invar is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- alloy (what does alloy mean?)
- metal (what does metal mean?)