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[broh-meen, -min] /ˈbroʊ min, -mɪn/
noun, Chemistry
an element that is a dark-reddish, fuming, toxic liquid and a member of the halogen family: obtained from natural brines and ocean water, and used chiefly in the manufacture of gasoline antiknock compounds, pharmaceuticals, and dyes. Symbol: Br; atomic weight: 79.909; atomic number: 35; specific gravity: 3.119 at 20°C.
Origin of bromine
1827; < French brome bromine (< Greek brômos stench) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bromine
  • Chlorine is also used in the production of chlorates and in bromine extraction.
  • The seaweed was used to produce iodine, but also contained bromine.
  • Several of the heavier bromine isotopes from fission are delayed neutron emitters.
  • All of the radioactive bromine isotopes are relatively short lived.
  • bromine is a halogen, and is less reactive than chlorine and more reactive than iodine.
  • bromine, like chlorine, is also used in maintenance of swimming pools.
  • Instead, bromine exists exclusively as bromide salts in diffuse amounts in crustal rock.
  • In this treatment, bromide anions are oxidized to bromine by the chlorine gas.
  • bromine also undergoes electrophilic addition to phenols and anilines.
  • Like the other halogens, bromine participates in free radical reactions.
British Dictionary definitions for bromine


/ˈbrəʊmiːn; -mɪn/
a pungent dark red volatile liquid element of the halogen series that occurs in natural brine and is used in the production of chemicals, esp ethylene dibromide. Symbol: Br; atomic no: 35; atomic wt: 79.904; valency: 1, 3, 5, or 7; relative density 3.12; density (gas): 7.59 kg/m³; melting pt: –7.2°C; boiling pt: 58.78°C
Word Origin
C19: from French brome bromine, from Greek brōmos bad smell + -ine², of uncertain origin
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
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Word Origin and History for bromine

nonmetallic element, 1827, from French brome, from Greek bromos "stench." With chemical suffix -ine (2). The evil-smelling dark red liquid was discovered by French chemist Antoine Jérôme Balard (1802-1876), who initially called it muride.

Online Etymology Dictionary, © 2010 Douglas Harper
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bromine in Medicine

bromine bro·mine (brō'mēn)
Symbol Br
A volatile nonmetallic liquid element, having a highly irritating vapor. It is used in gasoline antiknock mixtures and photographic chemicals. Atomic weight 79.904; atomic number 35; melting point -7.2°C; boiling point 58.78°C; specific gravity 3.12; valence 1, 3, 5, 7.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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bromine in Science
Symbol Br
A reddish-brown volatile element of the halogen group found in compounds occurring in ocean water. The pure form is a nonmetallic liquid that gives off a highly irritating vapor. It is used to make dyes, sedatives, and photographic film. Atomic weight 79.904; atomic number 35; melting point 7.2°C; boiling point 58.78°C; specific gravity 3.12; valence 1, 3, 5, 7. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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