Ultracold

adj, slang

adj, slang ·Uncommon ·College level

Definitions

Adjective
  1. 1
    Of a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.
  2. 2
    Extremely cold; of utmost coldness. informal

Example

More examples

"Physicists use ultracold atom facilities on Earth for a variety of experiments that probe the fundamental behaviors of atoms."

Etymology

From ultra- + cold.

Related phrases

absolute zeroquantum mechanical

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.