polychlorinated biphenyl: meaning, definition, pronunciation and examples
C2Technical, Scientific, Environmental Policy
Quick answer
What does “polychlorinated biphenyl” mean?
a class of synthetic, stable, toxic chemical compounds formerly used in industrial applications like electrical equipment and hydraulic fluids.
Audio
Pronunciation
Definition
Meaning and Definition
a class of synthetic, stable, toxic chemical compounds formerly used in industrial applications like electrical equipment and hydraulic fluids.
Refers to a group of persistent organic pollutants (POPs) consisting of 209 congeners. They are chemically inert, resistant to degradation, and bioaccumulate in the food chain, leading to significant environmental and health concerns, including carcinogenic effects.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling 'polychlorinated' is consistent. Regulatory frameworks (EPA in US, DEFRA/Environment Agency in UK) differ, but the technical term is identical.
Connotations
Strongly negative connotations associated with pollution, toxicity, and corporate/industrial negligence (e.g., 'PCB contamination').
Frequency
Equally low-frequency in both varieties, confined to specialist discourse.
Grammar
How to Use “polychlorinated biphenyl” in a Sentence
[The site/soil/fish] is contaminated *with* PCBs.PCBs were used *in* transformers.Regulations prohibit the discharge *of* PCBs *into* waterways.Vocabulary
Collocations
Examples
Examples of “polychlorinated biphenyl” in a Sentence
adjective
British English
- The polychlorinated biphenyl concentration was alarming.
- Polychlorinated biphenyl contamination is widespread.
American English
- Polychlorinated biphenyl waste requires special handling.
- The site had a polychlorinated biphenyl problem.
Usage
Meaning in Context
Business
In liability and insurance contexts regarding contaminated land.
Academic
Central term in environmental chemistry and ecotoxicology research papers.
Everyday
Virtually never used in everyday conversation.
Technical
Precise term for a specific group of congeners in analytical chemistry and environmental engineering.
Vocabulary
Synonyms of “polychlorinated biphenyl”
Strong
Neutral
Weak
Vocabulary
Antonyms of “polychlorinated biphenyl”
Watch out
Common Mistakes When Using “polychlorinated biphenyl”
- Misspelling as 'polychloronated' or 'polychlorinate biphenyl'.
- Using 'PCB' as a countable noun without an article (e.g., 'It is PCB' vs. 'It is a PCB/contains PCBs').
FAQ
Frequently Asked Questions
No, their production was largely banned by the 1979 Stockholm Convention due to their toxicity and persistence. However, 'legacy' PCBs still exist in old equipment and contaminated sites.
A congener refers to one of the 209 theoretically possible individual chemical compounds in the PCB class, differing in the number and position of chlorine atoms on the biphenyl molecule.
They are stable, lipophilic (fat-loving), and accumulate in living organisms, leading to long-term exposure. They are classified as probable human carcinogens and can cause neurological, immune, and reproductive damage.
Historically in electrical transformers, capacitors, hydraulic fluids, and plasticizers. Today, exposure risks come from contaminated soil, sediment, water, and food (especially fish from polluted waters).
a class of synthetic, stable, toxic chemical compounds formerly used in industrial applications like electrical equipment and hydraulic fluids.
Polychlorinated biphenyl is usually technical, scientific, environmental policy in register.
Polychlorinated biphenyl: in British English it is pronounced /ˌpɒl.iˈklɔː.rɪ.neɪ.tɪd baɪˈfiː.nɪl/, and in American English it is pronounced /ˌpɑː.liˈklɔːr.ə.neɪ.ɾɪd baɪˈfiː.nəl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
POLY (many) CHLORINATED (with chlorine atoms) BIPHENYL (a two-ringed organic structure). Think: 'Many chlorine atoms on a double benzene backbone'.
Conceptual Metaphor
A 'LEGACY POISON' or 'CHEMICAL GHOST' – persists long after its use, haunting environments and health.
Practice
Quiz
What is a primary characteristic of polychlorinated biphenyls (PCBs)?