Definition

A type of metal made from iron and nickel that does not change size much when the temperature changes.

Example

Invar is often used in precision instruments because of its stability with temperature changes.

Conversation

Have you ever heard of invar?

Yeah, I think it's that metal alloy, right?

Exactly! It has a really low coefficient of expansion.

That's interesting! I wonder where it's commonly used.

Synonyms & Antonyms

Root Explanation

The word 'invar' is derived from 'invariable' (from Latin 'invariabilis', where 'in-' means not and 'variabilis' means changeable). It refers to something that does not change or is constant.

Memory Tip

Think of 'not changing' ('in-') and 'changeable' ('variabilis') to remember that 'invar' means something that remains constant.

Visually Confused Words