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Dictionary

PBB

Chem.
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. Also called polybrominated biphenyl.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

PBA

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