droplet

in atmospheric chemistry
https://doi.org/10.1351/goldbook.D01861
A small liquid particle. The size of droplets encountered in the atmosphere extends over a wide range; e.g. liquid
aerosol
solutions which make up the fine particle fraction of continental tropospheric
aerosol
are usually 2 μm in diameter. Cloud water droplets usually have diameters in the range of 570 μm, while rain droplets commonly have diameters ranging from 0.13 mm.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2185 [Terms] [Paper]