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 aerosol 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]
Citation: 'particulate matter' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04434 RIS BibTex EndNote
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Last revised: February 24, 2014