What is the medical term for scaly skin using suffix derma?

The medical term for scaly skin using the suffix -derma is xerosis. Xerosis is a skin condition characterized by dry, rough, and scaly skin. It is often caused by a lack of moisture in the skin, which can be due to a number of factors, including aging, sun exposure, dry weather, and certain medical conditions. Xerosis can be treated with moisturizers and other skin care products that help to restore moisture to the skin.