Also found in: Medical, Encyclopedia, Wikipedia.


 (bī-fĕn′əl, -fē′nəl)
A white or colorless crystalline compound, C12H10, used as a heat-transfer agent, in fungicides, and in organic synthesis. Also called diphenyl.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(baɪˈfɛnəl; -ˈfiː-)
1. (Elements & Compounds) a white or colourless crystalline solid used as a heat-transfer agent, as a fungicide, as an antifungal food preservative (E230) on the skins of citrus fruit, and in the manufacture of dyes, etc. Formula: C6H5C6H5
2. (Elements & Compounds) any substituted derivative of biphenyl
Also called: diphenyl
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(baɪˈfɛn l, -ˈfin l)

a water-insoluble powder, C12H10, from which benzidine dyes are derived: used chiefly as a heat-transfer agent and in organic synthesis.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Aromatic polyimides having axially dissymmetric 2,2' bis(p-aminophenoxy) biphenyl units.
The U.S Environmental Protection Agency (EPA) and the Wisconsin Department of Natural Resources (DNR) have together announced plans for the removal of polychlorinated biphenyl (PCB) contaminants in a 39-mile section of the lower Fox River.
RTP says the halogen and non-halogen formulations comply with the German Hazardous Substance Ordinance and meet the requirements of the latest draft of the EU WEEE/ROS Directive on recycling, which calls for the elimination of polybrominated biphenyl and diphenyl-ether flame retardants.
The sodium biphenyl solution in ethyl diglyme quantitatively abstracts all halide species and converts them to an ionic form suitable for assay by various classical methods.
Niimi (1988), "Trophodynamic Analysis of Polychlorinated Biphenyl Congeners and Other Chlorinated Hydrocarbons in the Lake Ontario Ecosystem," Environmental Science and Technology, 22(4):388-397.
Capacitors were manufactured at an Indiana facility, using PCBs as a dielectric fluid from fall 1957 until spring 1977, when PCBs were replaced with isopropyl biphenyl (Jones 1977).
If the "pro-lifers" are so concerned about the health of fetuses, why aren't they out in the streets protesting and demanding that the Bush Administration do something about heavy metal and polychlorinated biphenyl (PCB) pollution in our lakes, rivers and oceans?
Commercial preparations contain few or no strictly coplanar PCB or polybrominated biphenyl congeners.
There was no significant association between polychlorinated biphenyl levels and changes in cycle length or hormone levels.
Polychlorinated biphenyl concentration in raw and cooked north Atlantic bluefish fillets.