Nimbus (type of cloud)
Context
A cloud type that is dark and characteristically layered, producing rain, snow, or sleet
Explanation
Nimbus clouds are dense and dark, often associated with precipitation. They are the main type of cloud from which rain and other forms of steady precipitation fall.
Applications
The nimbus clouds gathered, signaling an approaching storm.
Weather forecasts often predict rain when nimbus clouds are present.
The landscape looked dramatic under the shadow of the nimbus clouds.