Dust cloud
A dust cloud was a concentration of dust in the form of a cloud. A dust cloud in space was known as an Interstellar dust cloud.

In 2368, after a Type C asteroid had struck an unpopulated continent on the planet Penthara IV, the resulting dust cloud could have created a phenomenon not unlike the nuclear winters of 21st century Earth. ()

See also 
 Dust storm
 Cometary dust cloud

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Meteorology
Geology