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PBB

Chemistry.
1.
any of the highly toxic and possibly carcinogenic aromatic compounds consisting of two benzene rings in which bromine takes the place of two or more hydrogen atoms: used as a fire retardant and additive for plastics.
Origin of PBB
p(oly)b(rominated) b(iphenyl)
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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