ultracold

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adjective

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

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Meanings

adjectiveultracold (comparative more ultracold, superlative most ultracold)

comparative more ultracold · superlative most ultracold

  1. natural sciencesOf a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.
  2. informalExtremely cold; of utmost coldness.

Origin

From ultra- + cold.

Full word history & related roots →

Translations

German ultrakalt
  • ultrakaltclose to zero Kelvin
Cite this entry
APA

ultracold. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/ultracold

MLA

“ultracold.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ultracold. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “ultracold,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/ultracold.

Source: ultracold on Wiktionary, CC BY-SA 4.0.