dust fall

in atmospheric chemistry
https://doi.org/10.1351/goldbook.D01869
Solid particles in the air which fall to the ground under the influence of gravity.
Source:
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2185 (https://doi.org/10.1351/pac199062112167)