ultracold

Valid in Scrabble

Definition of ultracold

2 senses · 1 part of speech · etymology included

Of a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.

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Of a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.
(informal)Extremely cold; of utmost coldness.

Definitions from Wiktionary, CC BY-SA.

From ultra- + cold.

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