polybrominated biphenyl
noun
poly·bro·mi·nat·ed biphenyl
ˌpä-lē-ˈbrō-mə-ˌnā-təd-
: any of several compounds that are similar to polychlorinated biphenyls in environmental toxicity and in structure but that have various hydrogen atoms replaced by bromine rather than chlorine
called also PBB
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Merriam-Webster unabridged
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