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Any of a family of industrial compounds produced by chlorination of biphenyl, used as insulating materials in electrical equipment, including transformers and capacitors, and in various other industrial applications. PCBs were banned in the United States in 1979 and now are noted primarily as environmental pollutants that accumulate in animal tissue with resultant pathogenic and teratogenic effects.
(Elements & Compounds) polychlorinated biphenyl
pl. PCB's, PCBs.
any of a family of highly toxic, possibly carcinogenic compounds consisting of two benzene rings in which chlorine replaces hydrogen, formerly used in industry: banned in the U.S. because of concern over contamination of water supplies.
(Printed Circuit Board). A board inside a computer holding all chips and other components.