poly chlorinated biphenyl

polychlorinated biphenyl

[pol-ee-klawr-uh-ney-tid, -klohr-]
noun Chemistry.

Origin:
1960–65; poly- + chlorinated

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World English Dictionary
polychlorinated biphenyl (ˌpɒlɪˈklɔːrɪˌneɪtɪd)
 
n
PCB any of a group of compounds in which chlorine atoms replace the hydrogen atoms in biphenyl: used in industry in electrical insulators and in the manufacture of plastics; a toxic pollutant that can become concentrated in animal tissue

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American Heritage
Medical Dictionary

polychlorinated biphenyl pol·y·chlo·rin·at·ed biphenyl (pŏl'ē-klôr'ə-nā'tĭd)
n.
PCB.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
polychlorinated biphenyl   (pŏl'ē-klôr'ə-nā'tĭd)  Pronunciation Key 
See PCB.
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