ultracold

Fetched 2026-10-26 (cache).

Synonyms: ultracool

Antonyms: ultracool

Related words from Datamuse; suggestions, not definitions.

Adjective

1. {{lb|en|physics}} Of a [[temperature]] close to [[absolute zero]], especially one at which [[quantum-mechanical]] properties are observed.
2. {{lb|en|informal}} Extremely [[cold]]; of [[utmost]] [[coldness]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.