The term nimbus was given to complex sytems of cirriform, cumuliform, and stratiform clouds with sufficient vertical development to produce significant precipitation and it came to be identified as a distinct "nimbiform" physical category.
The term nimbus was given to complex sytems of cirriform, cumuliform, and stratiform clouds with sufficient vertical development. This was to produce significant precipitation. It came to be identified as a distinct "nimbiform" physical category.