Particles with a diameter less than ten micrometers (ten microns)
Particulates that are less than 10 microns in diameter. These particulates are present in the smoke created by burning wood. ... (05 Dec 1998) ... 
Type: Term Definitions: 1. Organic particles, or particulate matter, as in smoke, measuring between 2.5 and 10 microns in diameter.
Veraguas Province, Panama
Particles in air of with a maximum aerodynamic diameter of 10 µm
Clusters of small particles, such as carbon particles, in the air that come mostly from vehicle exhausts. There is a link between increase in PM10 levels and a rise in death rate, increased hospital admissions, and asthma incidence. The elderly and those with chronic heart or lung disease are most at risk. The smaller the particulates the more dang...
Particulate matter with a mean aerodynamic diameter of 10 micrometers (0.0004 in) or less. Particles smaller than this diameter can be deposited in the lungs. PM10 is one of the six criteria pollutants specified under Title I of the Clean Air Act.