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Meaning of dumb hole | Babel Free

Noun CEFR B2

Definitions

A phenomenon in which phonons (sound perturbations) are unable to escape from a fluid that is flowing more quickly than the local speed of sound.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See all B2 English words →

See also

dumb insolence dumb luck dumb money dumb network dumb peal dumb piano

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