bromine(redirected from Br2)
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n. Symbol Br
A dense, volatile, corrosive, reddish-brown, nonmetallic liquid halogen element that exists as a diatomic molecule, Br2 having a highly irritating vapor. Chiefly isolated from brines, it is used in producing fumigants, dyes, water purification compounds, and photographic chemicals. Atomic weight 79.904; atomic number 35; melting point -7.2°C; boiling point 58.8°C; density of gas 7.59 grams per liter; specific gravity (liquid, at 20°C) 3.12; valence 1, 3, 5, 7. See Periodic Table.
[French brome (from Greek brōmos, stench) + -ine.]
(Elements & Compounds) 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
[C19: from French brome bromine, from Greek brōmos bad smell + -ine2, of uncertain origin]
bro•mine(ˈbroʊ min, -mɪn)
a dark reddish, fuming, toxic liquid element obtained from natural brines and ocean water and used chiefly in gasoline antiknock compounds, pharmaceuticals, and dyes. Symbol: Br; at. wt.: 79.909; at. no.: 35; sp. gr.: 3.119 at 20°C.
[1827; < French brome bromine (< Greek brômos stench) + -ine2]
Symbol Br A reddish-brown halogen element that can be found in combined form 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 number 35. See Periodic Table.
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|Noun||1.||bromine - a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water|
chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
halogen - any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions