Mutatus
From Glossary of Meteorology
mutatus
A term used when the whole or a large part of a cloud undergoes a change from one genus to another.
The new cloud is then given the name of the appropriate genus, followed by the name of the genus of the mother-cloud with the addition of the suffix "mutatus" (e.g., stratus stratocumulomutatus).
Compare genitus.
Compare genitus.