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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.

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Word History and Origins

Origin of PBB1

p(oly)b(rominated) b(iphenyl)

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petrichor

[pet-ri-kawr]

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