- Material suspended floating around in the shape of min solid particles or fluid droplets, particularly when considered as an atmospheric pollutant.
- Any solid or fluid in a finely subdivided condition, specially when thought to be an atmospheric pollutant.
- a tiny discrete mass of solid or fluid matter that remains individually dispersed in gasoline or liquid emissions (usually considered to be an atmospheric pollutant)
Hyponym for "particulate matter"
Hypernym for "particulate matter"