A form of atmospheric pollution, a mixture of aerosols that absorb and scatter light, resulting from the burning of biomass and fossil fuel.

Alternative form of cloudburst

(chemistry) The temperature at which one component of a mixture of liquids begins to solidify (or a mixture of liquids starts to become immiscible) on cooling, resulting in visible cloudiness; as for example in diesel fuel in freezing temperatures; the consolute point

(meteorology) A high-altitude cloud that is shaped like a lens.

(meteorology) polar stratospheric cloud

(meteorology) A tapering cloud descending from a larger storm cloud, indicating the presence of an intense vortex. A tornado is a funnel cloud which reaches the ground.

A wall of clouds, rising above horizon or observed from a distance, but not overhead.

Alternative form of cloudburst

The location above the surface of the Earth where the lowest layer of clouds are reported as broken, overcast or obscuration (as opposed to thin or partial).

(astronomy) A large group of many stars spread over very many light-years of space; the stars are not part of any structure but are in an area of greater than average stellar density.