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2017 Word of the Year

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)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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