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particulate matter

DEFINITIONS OF: particulate matter

1

n 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)

Synonyms:
particulate
Types:
dust
fine powdery material such as dry earth or pollen that can be blown about in the air
chalk dust
dust resulting from writing with a piece of chalk
fallout, radioactive dust
the radioactive particles that settle to the ground after a nuclear explosion
Type of:
material, stuff
the tangible substance that goes into the makeup of a physical object
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