Nimbus clouds are a type of cloud that is typically associated with precipitation. They are thick, dark clouds that often cover the sky and can produce rain, snow, or other forms of moisture. The name "nimbus" comes from the Latin word for "rain," highlighting their role in weather patterns. These clouds are usually low to mid-level in the atmosphere and can appear in various forms, such as nimbostratus or cumulonimbus. Nimbostratus clouds are uniform and spread out, while cumulonimbus clouds are towering and can lead to thunderstorms. Both types are important for the water cycle and weather systems.