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particulate matter is a noun meaning "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)". It carries one recorded sense.
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)
Definitions, synonyms and semantic relations for particulate matter come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.