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particulate matter

   Also found in: Medical, Acronyms, Wikipedia 0.06 sec.
particulate matter
n. Abbr. PM
Material suspended in the air in the form of minute solid particles or liquid droplets, especially when considered as an atmospheric pollutant.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.particulate matter - a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant)
particulate
material, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread"
dust - fine powdery material such as dry earth or pollen that can be blown about in the air; "the furniture was covered with dust"


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