second sound

noun

Definition of second sound

: transfer of heat which is much faster than conduction or convection, which is observed only in helium II, and in which waves of temperature resembling sound waves travel at speeds of about 20 meters per second

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Cite this Entry

“Second sound.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/second%20sound. Accessed 17 Sep. 2021.

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