What prefix or suffix is used to indicate a raincloud when added to a cloud form?

The suffix "nimbo" is specifically used to denote a raincloud when added to a cloud form. For example, "nimbostratus" indicates a layered cloud that brings continuous rainfall, while "cumulonimbus" denotes a towering cloud associated with thunderstorms. The term "nimbo" comes from the Latin word "nimbus," meaning rain or cloud, which indicates the presence of precipitation. This distinction is important in meteorology as it helps classify clouds based on their potential weather impact, particularly concerning rain.

Other terms like "strato," "cirro," and "cumulus" refer to different characteristics of clouds, such as their altitude or structure, but they do not inherently signify the presence of rain on their own. For instance, "cumulus" refers to puffy, white clouds typically associated with fair weather, while "strato" denotes layered clouds at lower altitudes. Thus, "nimbo" is the appropriate suffix to indicate rainclouds in various cloud classifications.