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bel1

[bel]
noun Physics.
  1. a unit of power ratio, equal to 10 decibels.
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Origin of bel1

First recorded in 1925–30; named after A. G. Bell

bel2

[bel]
noun
  1. bael.
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Bel.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for bel

bel

noun
  1. a unit for comparing two power levels, equal to the logarithm to the base ten of the ratio of the two powersSymbols: B, b See also decibel
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Word Origin

C20: named after Alexander Graham Bell

Bel

noun
  1. (in Babylonian and Assyrian mythology) the god of the earth
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bel

Bel

heaven-and-earth god of Babylonian religion, from Akkadian Belu, literally "lord, owner, master," cognate with Hebrew ba'al.

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adj.

"beautiful," early 14c., from Old French bel, belle "beautiful, fair, fine" (see belle). "Naturalized in ME.; but after 1600 consciously French" [OED].

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n.

unit of power level in measuring sound, 1929, named for Scottish-born telephone pioneer Alexander Graham Bell (1847-1922).

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Online Etymology Dictionary, © 2010 Douglas Harper

bel in Medicine

bel

(bĕl)
n.
  1. A unit expressing the relative intensity of a sound, equal to ten decibels.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

bel in Science

bel

[bĕl]
  1. A unit of measurement equal to ten decibels.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.