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Definition of bel noun from the Oxford Advanced Learner's Dictionary

bel

noun
 
/bel/
 
/bel/
(specialist)
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  1. a measurement of sound equal to 10 decibels
    Word Origin1920s: from the name of A. G. Bell (1847-1922), who invented the telephone and the gramophone.
See bel in the Oxford Advanced American Dictionary

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