Similar term(s): particle size.
Airborne particles have irregular shapes, and their aerodynamic behaviour is
expressed in terms of the diameter of an idealised spherical particle known as
Particles are sampled and described on the basis of their aerodynamic
diameter, which is usually simply referred to as particle size.
Particles having the same aerodynamic diameter may have different dimensions
Source: based on the
GreenFacts Digest on Air Pollution
For more on the aerodynamic diameter of particles, see the Module 3 of the US EPA
on the characteristics of particles .
Aerodynamic(s) - Coarse particles - Fine particles - Particulate matter