pollutant
puh-LOO-tuhnt
/pəˈluːtənt/
A substance introduced into the environment that has undesirable, dirtying, or toxic effects.
Refers specifically to the agent causing contamination, rather than the act of contaminating itself.
The story behind the word. Traces back to Latin 'polluere' (to defile, soil, or corrupt), formed from 'pro-' (forth) and 'luere' (to wash or besmirch). The noun 'pollutant' emerged in 20th-century environmental science to specify distinct harmful compounds.
Word relationships
- contaminant: 'Contaminant' emphasizes making something impure by contact; 'pollutant' implies environmental harm.
- purifier: A purifier removes unwanted substances rather than introducing harmful ones.
Commonly confused with
- pollution: Pollution is the condition of being dirty; a pollutant is the specific chemical or material causing it.
Word family
- pollute (verb): To make foul or unclean.
- pollution (noun): The presence or introduction of harmful substances into the environment.
Collocations
- air pollutant
- chemical pollutant
- major pollutant
- pollutant concentrations
Example sentences
- "Every major pollutant released into the city's air worsens the seasonal respiratory health crises." Public Health
- "Engineers designed filtration systems specifically to catch chemical pollutants before they exit factory stacks." Environmental Regulation
Memory hook
A pollutant LUTes (loots) clean air and makes it dirty. Pollutant = The physical substance that corrupts clean air.
When not to use
Do not confuse with 'pollution', which is the general state or act of contamination.
Fun facts
- Light and noise are officially classified as environmental pollutants by international regulatory agencies.
Related words
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