particulate matter

in atmospheric chemistry
https://doi.org/10.1351/goldbook.P04434
A general term used to describe airborne solid or liquid particles of all sizes. The term @A00176@ is recommended for general use in describing airborne particulate matter.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2205 [Terms] [Paper]