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Particulate matter (in atmospheric chemistry)
1. General term used to describe airborne solid or liquid particles of all sizes.
2. Particlesin air, usually of a defined size and specified as PMn where n is the maximum aerodynamic diameter (usually expressed in μm) of at least 50% of the particles.
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- Part of Speech: noun
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- Industry/Domain: Biology; Chemistry
- Category: Toxicology
- Company: National Library of Medicine
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