Any of a class of stable organic compounds obtained by the bromination of biphenyl; they have many industrial applications, but are hazardous pollutants
A class of aromatic organic compounds formed by the chlorination of the hydrocarbon biphenyl; they have many industrial applications but are damaging to the environment
(Kimya) Any of several compounds that are produced by replacing hydrogen atoms in biphenyl with chlorine, have various industrial applications, and are toxic environmental pollutants which tend to accumulate in animal tissues ¯ called also PCB