Which one of the following describes dry scaly skin?

Asteatosis is the term that specifically describes dry, scaly skin. This condition typically occurs when there is a deficiency of natural oils in the skin, often resulting in rough and flaky texture. Asteatosis can be influenced by various factors, including aging, environmental conditions, and certain dermatological conditions.

In contrast, corium refers to the deeper layer of the skin, also known as the dermis, which provides structure and support but does not describe a skin condition. Chloasma is a skin condition characterized by brown patches, often related to hormonal changes, rather than dry skin. Cicatrix denotes a scar that forms as a result of healing after an injury, which does not relate to the description of dry, scaly skin. Thus, asteatosis is the accurate term for this specific skin condition.