| PBBs | polybrominated biphenyls |
|---|
| polybrominated biphenyls | Biphenyl compounds which are extensively brominated. Many of these compounds are toxic environmental pollutants. (12 Dec 1998) |
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| polychlorinated biphenyls | Biphenyl compounds which are extensively chlorinated. Many of these compounds are toxic environmental pollutants. (12 Dec 1998) |
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