Definition

Very low in temperature, often close to absolute zero, where unusual physical properties can occur.

Example

Scientists are studying ultracold atoms to understand quantum mechanics better.

Conversation

Did you hear about the new lab that studies ultracold temperatures?

Yeah, I've read a bit about it; they say it's fascinating!

I can’t believe how close to absolute zero they can get the materials.

Right? It’s amazing how many weird properties show up at those ultracold levels.

Synonyms & Antonyms

Root Explanation

Ultracold → It is formed from "ultra-" (meaning beyond or extreme) and "cold" (from Old English "ceald", meaning low temperature). The word "ultracold" refers to temperatures that are extremely low, beyond the usual cold.

Memory Tip

Think of 'ultra-' meaning beyond, and 'cold' referring to low temperatures. This helps you remember that 'ultracold' describes something that is extremely cold.

Visually Confused Words