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Meaning of second sound | Babel Free

Noun CEFR B2

Definitions

A wave of fluctuating temperature or entropy propagated in the superfluid phase of liquid helium.

uncountable

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

second source Second Spanish Republic second strike second string Second Sunday of Easter second team