noun

decibel

decibel

The noise level was 90 decibels.

The noise level was 90 decibels.

((number)) decibels ((number)) decibels The noise level was 90 decibels.

Synonyms: dB (abbreviation)

From 'deci-' (meaning a tenth) + 'bel', a unit named after Alexander Graham Bell.

Remember 'deci-' for ten, as in decimal, and 'bel' for Bell, the inventor. It's a unit of sound.

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