second sound

Fetched 2026-10-26 (cache).

Synonyms: second round

Antonyms: second round

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|physics}} A [[wave]] of [[fluctuate|fluctuating]] [[temperature]] or [[entropy]] [[propagate]]d in the [[superfluid]] [[phase]] of [[liquid helium]].

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