PCB

noun

ˌpē-(ˌ)sē-ˈbē How to pronounce PCB (audio)
: polychlorinated biphenyl

Examples of PCB in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
One can point now to GE’s 20th century polluting of the Hudson River with PCB chemical contamination or to the tens of millions the company paid out in price-fixing claims during the 1960s. — Michael Kilian, USA Today, 15 Apr. 2026

Word History

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of PCB was in 1966

Browse Nearby Words

PC
PCB
pce
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Cite this Entry

“PCB.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/PCB. Accessed 24 Jul. 2026.

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Medical Definition

More from Merriam-Webster on PCB

Britannica.com: Encyclopedia article about PCB

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